A researcher wants to conduct a study to see if playing chess improves memory. The researcher finds 50 individuals who play chess regularly and 50 that do not. Each of the 100 individuals are given a questionnaire designed to determine memory level. If the 100 individuals did not know they were participating in the study, which statement about the study is correct?.

Answers

Answer 1

Answer:

This is an observational study

Explanation:

just took the test


Related Questions

Which of the following statements regarding the moon and earth is correct.

Answers

Answer:

please the question is choice or what

Answer: Earth and the Moon are nearly the same age.

Explanation:

Which statements justify that the dilation of triangle stu is an enlargement increasing its size by the magnitude of the scale factor? select two options. The triangle pre-image is closer to the point of dilation than the image. The triangle image is closer to the point of dilation than the pre-image. The value of the scale factor, , is between 0 and 1. The value of the scale factor, 6, is greater than 1. The vertices of the pre-image are collinear with the vertices of the image.

Answers

There are different ways to justify a statement. The statements that justify that the dilation of triangle STU are:

The triangle pre-image is closer to the point of dilation than the image.The value of the scale factor, 6, is greater than 1.

Dilation

Dilation is simply known as a process that is often employed for producing similar figures. All the point is said to be stretched outwards from the center point and it is then multiplied by the distances by the scale factor.

A dilation is also known to be a type of transformation that makes bigger or reduces a figure. (This is called the preimage).  With this process, a new figure or  image is created or produced.

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Answer:

The triangle pre-image is closer to the point of dilation than the image.

The value of the scale factor, 6, is greater than 1.

Explanation:

just did it

Quantities that can be described completely by their magnitude or size are called vector quantities.

Answers

In physics, there are two types of quantities

Scalar quantityVector quantity

Scalar quantities are quantities that have magnitude but no direction. Examples of such quantities include speed, pressure, etc

Vector quantities are quantities that have both magnitude and direction. Examples of such quantities include velocity, acceleration etc.

Vector quantities are represented by an arrow over the position of the object to denote its direction.

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Since customers who go to retail stores often know what they want or have a purpose to being at the store in the first place, sellers do not have to do much in the b2c selling environment.

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Answer:

Explanation:Prospecting or qualifying

Why did the elephant jump up and down riddle answer.

Answers

Explanation:

because he was thirsty?

or was he doing some exercise?

><

Answer:

Because he saw a mouse

Explanation:

Well first of all, the elephant can't jump... so yeah... the questions itself is WRONG

very far from earth (at r=[infinity]), a spacecraft has run out of fuel and its kinetic energy is zero. if only the gravitational force of the earth were to act on it (i.e., neglect the forces from the sun and other solar system objects), the spacecraft would eventually crash into the earth. the mass of the earth is me and its radius is re. neglect air resistance throughout this problem, since the spacecraft is primarily moving through the near vacuum of space.

Answers

By considering the conservation of energy, the speed V of the spacecraft when it eventually crash into the earth and  its distance from the center of the earth is r are 11172.6 m/s and 3294.6 m/s respectively.

Given that, r is at infinity when a spacecraft has run out of fuel and its kinetic energy is zero. if only the gravitational force of the earth were to act on the spacecraft would eventually crash into the earth.

Where

Mass of the earth  [tex]m_{e}[/tex] = 5.97 × [tex]10^{24}[/tex] kg

Radius of the earth [tex]R_{e}[/tex] = 6.38 × [tex]10^{6}[/tex] m

G = 6.67 x [tex]10^{-11}[/tex]N[tex]m^{2}kg^{-2}[/tex]

a.)  Since the spacecraft is primarily moving through the near vacuum of space, the speed V of the spacecraft when it eventually crash into the earth can be calculated by considering the conservation of energy.

The total initial energy  =  total final energy.

[tex]E_{i} = E_{f}[/tex]

[tex]K.E_{i}[/tex] + [tex]U_{i}[/tex] = [tex]K.E_{f}[/tex] + [tex]U_{f}[/tex]

where [tex]K.E_{i}[/tex] = 0

-G[tex]m_{e}[/tex]m/(r + [tex]R_{e}[/tex]) = 1/2m[tex]V^{2}[/tex] + ( -G[tex]m_{e}[/tex]m)/[tex]R_{e}[/tex]

mass of the spacecraft will cancel out

G[tex]m_{e}[/tex]/(r + [tex]R_{e}[/tex]) = 1/2[tex]V^{2}[/tex] + ( -G[tex]m_{e}[/tex])/[tex]R_{e}[/tex]

G[tex]m_{e}[/tex]/(r + [tex]R_{e}[/tex]) = 0 since r is at infinity.

0 =  1/2[tex]V^{2}[/tex] + ( -G[tex]m_{e}[/tex])/[tex]R_{e}[/tex]

Substitute all the parameters into the equation above.

0 = 0.5[tex]V^{2}[/tex] + ( -6.67 x [tex]10^{-11}[/tex] x 5.97 x [tex]10^{24}[/tex] )/6.38 x [tex]10^{6}[/tex]

0.5[tex]V^{2}[/tex] = 62,413,636.36

[tex]V^{2}[/tex] =  62,413,636.36 / 0.5

[tex]V^{2}[/tex] = 124,827,272.7

V = [tex]\sqrt{124,827,272.7}[/tex]

V = 11172.6 m/s

b.) Given that the distance from the earth r = x([tex]R_{e}[/tex])

That is,

r = 11.5 x 6.38 x [tex]10^{6}[/tex]

r = 73,370,000 m

To find the spacecraft's speed when its distance from the center of the earth is r, we will use the same formula. That is,

[tex]K.E_{i}[/tex] + [tex]U_{i}[/tex] = [tex]K.E_{f}[/tex] + [tex]U_{f}[/tex]

0 =  1/2[tex]V^{2}[/tex] + ( -G[tex]m_{e}[/tex])/r

Substitute all the parameters into the formula

0 = 0.5[tex]V^{2}[/tex] + ( -6.67 x [tex]10^{-11}[/tex] x 5.97 x [tex]10^{24}[/tex] )/ 73,370,000

0.5[tex]V^{2}[/tex] = 5427272.727

[tex]V^{2}[/tex] = 10854545.45

V = [tex]\sqrt{10854545.45}[/tex]

V = 3294.6 m/s

Therefore, the speed V of the spacecraft when it eventually crash into the earth and  its distance from the center of the earth is r are 11172.6 m/s and

3294.6 m/s respectively.

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What happens when the barrel goes over the waterfall?.

Answers

the barrel will crash down

Use a graphing calculator to approximate the vertex of the graph of the parabola defined by the following equation. Y = x squared + x + 6 a. (0. 5, -5. 75) c. (-0. 5, 6) b. (-0. 5, 5. 75) d. (0. 5, 5. 75).

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The vertex is b. (-0.5, 5.75)

The ratio between the amounts of muscle on your body to the amount of fat on your body is called.

Answers

Answer:

The ratio between the amount of muscle on your body to the amount of fat on your body is called. Body composition

what viewpoint is conveyed by sophocles through the following lines spoken by antigone to creon regarding his decree that she disobeyed? creon. didst thou, then, dare to disobey these laws? antig. yes, for it was not zeus who gave them forth, nor justice, dwelling with the gods below, who traced these laws for all the sons of men; nor did i deem thy edicts strong enough, coming from mortal man, to set at naught the unwritten laws of god that know not change. the government is always the highest law of the land. religious law is above or greater than man's law. the laws of the government are sometimes correct and sometimes incorrect. one must be willing to accept punishment for breaking laws.

Answers

There are different kinds of laws. The viewpoint that is conveyed by Sophocles through the following lines spoken by Antigone to Creon regarding his decree that she disobeyed is that religious law is above or greater than man's law.

In the text, we can see Creon emphasizes on the unwritten laws of gods that know not change. She is trying too acknowledge the fact that the laws of the gods are greater than man's law and cannot be altered for any thing at all.

The Antigone is known too  be a tragedy play that was written by the ancient Greek playwright called Sophocles. It was known to be written around 442 BCE.

The play centers around Antigone’s burial of her brother Polynices (Polyneices), after defying the laws of Creon and the state, and the outcomes  of her act of civil disobedience.

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Complete the equation of the line through (-9 7) and (-6 -3).

Answers

The answer is:

Point Slope Form:

y-7 = -10/3 * (x + 9)

Slope-intercept form:

y= -10/3x - 23

Iq is determined by brainly.

Answers

Answer:

False

Explanation:

Intelligence Quotient (IQ) is a number representing a person's reasoning ability. It's determined by dividing a person's score on a special test by his or her age, then multiplying by 100

Answer:

false

Explanation:

have a good night :)

Which is the best inference from the author's statement that world war ii ""ended the great depression""? the best inference from the author's statement is that.

Answers

Answer:i think

Explanation:

Answer:

The increased production needed to support the war effort created additional jobs for those who were unemployed.

Explanation:

Which is a type of heat transfer that causes the air at the top floor.

Answers

Explanation:

Convection is the the transfer of heat my the physical movement of hot masses of air. As air is heated, it expands (as do all objects). As it expands, it becomes lighter then the surrounding air and it rises.

Which of the following statements is(are) correct when discussing homeostasis?.

Answers

Homeostasis is the physiological process by which the temperature and other functions are regulated. The internal conditions, sensor, effector, and control center of the feedback system are all related to homeostasis.

What is homeostasis?

Homeostasis is the internal autoregulation of the internal environment of the body that provides stability to an organism. To maintain homeostasis the internal body conditions are regulated continuously.

The sensor, effector, and control center are the component of the feedback system that monitors, changes, and compares the physiological value of the bodily functions.

Therefore, homeostasis maintains the internal conditions of the body.

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what is the effective nuclear charge for a 2nd row electron in sulfur?

Answers

Sulfur valence electrons have an effective nuclear charge of +6.

What are effective nuclear charge?

Effective nuclear charge is defined as the true positive nuclear charge that an electron in a multi-electron atom experiences. Electrons and protons are the two elements that cause the effective nuclear charge to rise. Zeff = Z - S is the actual nuclear charge.

A sulfur second row electron's effective nuclear charge is 14. Since sulfur contains 16 protons, or 16 atomic numbers, we know that there are 2 electrons in its first shell or orbit, which due to its rapid speed creates a shielding effect.

Thus, sulfur valence electrons have an effective nuclear charge of +6.

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Three people made the diagrams above to show what they think the moon looks like when it is seen from above (top view). In these diagrams, the sunlight is coming from the left, as shown by the arrows. Which diagram is accurate and why?.

Answers

When a diagram or a technical drawing is made, it can be either in three-dimensional mode (3D) or two-dimensional mode (2D) and can be viewed in different ways depending on the perspective.

With this in mind, there are different ways of viewing a drawing or diagram and they include:

Top ViewSide ViewFront View, etc

Please note that your question is incomplete so I gave you a general overview to help you get a better understanding of the concept.

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Answer:c

Explanation:

which interest group is an example of a single-issue interest group? everytown for gun safety national league of cities center for health & gender equity american civil liberties union (aclu)

Answers

Answer:

everytown for gun safety

Explanation:

got it right on edge 2021

It should be noted that the interest group is an example of a single-issue interest group is everytown for gun safety

According to the question, we are to discuss interest group and how it works and the example.

As a result of this we can discuss Interest group as special interest groups that are set up for various forms of advocacy  so they can influence public opinion.

Therefore, everytown for gun safety serves as example of a single-issue interest group.

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With the use/abuse of alcohol the heart is less efficient.

Answers

Answer:

Explanation:

because it is overloading the heart with a non regular item.

Select the correct answer. Which is a feature of a roth ira? a. You must pay tax if you withdraw your earnings once you're 59. 5 years old. B. You can withdraw your earnings once you're 59. 5 years old but must pay a penalty. C. You can withdraw your earnings once you're 59. 5 years old without paying a penalty.

Answers

I think the answer is C

you can withdraw your earnings once you're 59. 5 years old without paying a penalty

If you don't sleep enough at night you will be very ____ in the morning.

Answers

Answer:

cansado

Explanation:

If you don't sleep enough at night, you will be very cansado (tired) in the morning.

What must a scientist do in order to develop a testable hypothesis brainly.

Answers

Answer: The correct answer is D. Ask a question that can be answered by making observations.

Explanation:

Basically, in order to develop a testable hypothesis, scientists must adhere to the guidelines of the scientific method.

The scientific method is usually understood to be a so-called hypothetical-deductive method, the core of which is to make hypotheses based on observations or measurements, to make predictions based on them and to check the validity of predictions by repeated experiments. More generally, the scientific method is a general way of obtaining solid knowledge, using many means of proof, both empirical and theoretical, to achieve certainty. The scientific method is a widely recognized tool in the scientific community for seeking objectivity, reliability and transparency in research.

While on vacation in guadalajara, you are shopping downtown and notice the following sign hanging in a store window. What type of store is this? clothing store candy store jewelry store show store.

Answers

Answer:

Jewellery Store

Explanation:

pls mark me as brainliest!!

Answer:

Jewellery Store

Explanation:

Jewellery Store

Abrir abro, abris, abri, abrimos, abrís, abrin abro, abres, abre, abrimos, abrís, abren abro, abras, abra, abramos, abrís, abran abro, abres, abre, abremos, abrís, abren.

Answers

Answer:

Hi

Explanation:

Sorry but I don't understand what you are asking, is there any way you could elaborate??

Reread the following quotation from paragraph 75: "oh god! to hear the insect on the leaf pronouncing on the too much life among his hungry brothers in the dust!" which of the following best states what this quote reveals about the ghost of christmas present's and scrooge's differing points of view?.

Answers

There are different kinds of quotes. The option that best state what this quote reveals about the Ghost of Christmas Present’s and Scrooge’s differing points of view is;

It suggests that the spirit believes Scrooge is oblivious to his own suffering, like an insect that does not know what lies beyond its small environment.

The Ghost of Christmas Present is known to be a fictional story about a Christmas Spirits who visited Ebenezer Scrooge in the 1843. The aim was to offer him an opportunity for redemption.

People sometimes do not know what they are passing through. Scrooge wanted a change and as such was visited by three spirits. They made him realize things he had forgotten about himself.

See full question below

Reread the following quotation from paragraph 75: “Oh God! to hear the Insect on the leaf pronouncing on the too much life among his hungry brothers in the dust!” Which of the following best states what this quote reveals about the Ghost of Christmas Present’s and Scrooge’s differing points of view?

A. This reveals the spirit’s low opinion of Scrooge, who has a high opinion of his  own status.

B. This reveals the spirit considers Scrooge and other humans to be insects in  comparison to his power and wisdom.

C. This quote suggests that the spirit believes Scrooge is oblivious to his own  suffering, like an insect that does not know what lies beyond its small

environment.

D. This quote recalls Scrooge’s earlier words in favor of the poor dying off to lower  the population; the spirit puts Scrooge in his place, revealing that while Scrooge  may consider himself above others, the spirit knows to value the lives of other  Beings.

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Which describes an example of using unsecured credit?.

Answers

Answer:

An example of it is that someone buys new gutters for a home with a credit card. That a simple way to explain it and the answer should be about it xd

Explanation:

why is the standard deviation preferable to the range as a measure of​ variation?

Answers

Answer:

Explanation:

The standard deviation is preferable to the range as a measure of variation because the standard deviation takes into account all of the​ observations, whereas the range considers only the largest and smallest ones.

Kendra wants to write an opinion piece about her favorite food.

How should she organize her essay?
A. Group her reasons into paragraphs.
B. Explain all her reasons in the introduction.
C. Put her details in one paragraph and her reasons in another paragraph.
D. Put her topic in one paragraph and state her opinion in another paragraph.

Answers

Answer:

A

Explanation:

Grouping her reasons into paragraphs makes the most sense. Its more organized compared to the other options.

What is the central idea of this passage sundays are days of rest and ceremony on the farm.

Answers

Answer:

A

Explanation:

a system absorbs 52 joules of heat and does work using 25 joules of energy. what is the change in the internal energy of the system? 25 joules 27 joules 52 joules 77 joules

Answers

The change in the internal energy of the system is 27 joules

From the question given above, the following data were obtained:

Heat absorbed (Q) = 52 JWork (W) = –25 J (since work is done by the system) Change in internal energy (ΔU) =?

The change in the internal energy of the system can be obtained as follow:

ΔU = Q + W

ΔU = 52 + (–25)

ΔU = 52 – 25

ΔU = 27 J

Therefore, the change in the internal energy of the system is 27 J

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Answer:

27 J

Explanation:

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Please help?!! Hurry please!! Identify the digit in the ten thousandths place in every number.1.) 12.00535 2.)54.012473.) 3.980564.) 0.006675.) 70.700716.) 0.078897.) 10.00898 Social forces that helped shaped Europe during the time period 1400-1700 30x - 12y i need help I need help in php coding What is the value of i 20+1?11ii The author writes in paragraph 4 that he or she "spend[s]the winter dreaming of summer and the summer dreaming of winter." On the other hand, many people would say that they have specific favorite seasons or times of year. How do you feel? Do you have a favorite season, or do you always look forward to whatever is to come? Why? Please helppp!!I have to find the slope of the blue line that is in the graph!! 7m 28cm 8= something cm what was the key issue that divided the democratic party in 1860? does (0,0) make the equation y = x true The second last character in a String str can be accessed bya) str[-3] b) str[-2] c) str[2] d) str[3] How long did the Mexican-American War last? What factors enabled the U.S. to defeat Mexico? A restaurant tablecloth is 98 inches across. What is the approximate circumference? Based on the root mov-, what does the word movement mean?. If line segment AB represents 25%, what is the length of a line segment that is 100%? what are the main reasons that islam spreads so quickly? explain in one paragraph. In Culinary class, Jennifer roads a recipe that noods wited spinach and decides to use salt to propare the leaves. She places the spinach in a solution of 8% salt, which causes the plant cols to shrinksince they normally have an internal salt concentration of 0.9% salt. Which statement best explains why the cells shrink?Sall causes the cell membrane to swet and absorb water trom the cytoplamSat moves from the 8 sal solution into the cell and chemically bind with waterWater moestrom the cell through the cell membrane to an area of lower water concentrationO Water moves from a lower concentration of water in colis cytoplasm into the nucles and colorganelles Dez was called to solve a problem on the whiteboard in class. His work is shown below.0.8 Four-fifths8/10 4/5 = 32/5StartFraction 32 over 5 EndFraction = 6Two-fifthsIs the answer shown reasonable? (A) The answer is reasonable because 0.8 was converted to an equivalent fraction. (B) The answer is reasonable because it is greater than both factors.(C) The answer is not reasonable because 4/5 of a number should be less than the number. (D)The answer is not reasonable because StartFraction 32 over 5 EndFraction does not equal 6Two-fifths.HELP ME PLZ!!!!! help help lollslsllsls