company that manufactures a popular multivitamin wanted to determine whether their multivitamin had any side effects. For its initial study, the company chose 2000 individuals to take one of their multivitamin tablets per day for one year. Scientists from the company surveyed the participants to determine whether they had experienced any side effects. The greatest problem with this procedure is that A) only one brand of vitamin was tested B) the study lasted only one year C) the sample size was not large enough D) no control group was used

Answers

Answer 1

Answer:

Option D

Step-by-step explanation:

In this experiment, It would have been scientific to compare the result of the experiment on the experimental group(taking the multivitamin) with the control group (Taking no medicine)

Without a control group, a defined impact of multivitamin over the experimental group cannot be deduced.

Hence, option D is correct


Related Questions

HELP FAST ANSWER IF YOU ARE 100% sure. Any decimal answers are wrong so if the answer you got is a decimal don't put as answer or you will be reported. Thank y'all!

Answers

Answer: Picture with answer below:

Step-by-step explanation:

Answer: 891ft

Step-by-step explanation:

Could someone help? I got my answer, but I want to check if I’m right.

Answers

Hope it helps you........

A 40-meter-long blade of a wind turbine makes one complete revolution in 10 seconds. To the nearest tenth, the linear velocity of the blade is meters per second.

Answers

Answer:

25.13 m/s

Step-by-step explanation:

Linear velocity = Distance / time

The distance = Circumference of turbine = 2πr

Radius, r = 40 m

Circumference= 2 * π * 40 = 251.327

The linear velocity is thus :

Circumference / time

= 251.327m / 10s

= 25.13 m/s

A circular pool has a
circumference of 65.94 ft.
What is the pools diameter?

Answers

Answer: 20.989353895 or round it up to 21

Step-by-step explanation:

If we want to find a diameter of a circle and given a circumference, we divide the circumference by pi

so 65.94 divide by pi = 20.989353895

The volume of a child's model plane
is 1200cm cube.
The volume of the full size plane is 4050 m cube.
Find the scale of the model in the fom 1:n.​

Answers

Answer:

Is 10B and you get like 1000

Answer:

you get like 1000

Four points are labeled on the number line. Which point represents the value of ∣−12∣?

Answers

Is it the absolute value? If so it’s 12.

Answer:

c

Step-by-step explanation:

   

The cookie-stacking competition is a tradition at Westhaven's annual summer festival, and Bert is helping to set it up this year. The first contestant who creates a single stack using all of their cookies wins a prize! After Bert split all the cookies he had evenly among 4 contestants, each contestant got 24 cookies.

Answers

Answer:

is this the full question?

Step-by-step explanation:

The diagram shows a regular polygon
What is the value of x?
How do I solve this

Answers

Answer: x=120°

Step-by-step explanation:

What you are looking for is the value of the exterior angle of the regular polygon.

For a n-sided regular polygon, the external angle is given by the formula 360°/n.

Because the shape in this example is a regular triangle, the value of n is 3.

360°/n

=360°/3

=120°

Therefore, x=120°

I still need help. Ty. >333

Answers

Answer:

Option 2, 3, and 4 are correct.

Step-by-step explanation:

how do you solve something like this?

Answers

Answer:

to find the value of x have to know that they would all add up to 180 degrees. so subtract 98 from 180. then you would have to find the angel of the part on the left.

Step-by-step explanation:

Answer:

X = 41

Step-by-step explanation:

this triangle is isosceles triangle, so

X + X + 98 = 180 ( being triangle)

2X + 98 = 180

2X = 82

therefore : X = 41

Find the smallest side of CDE?

Answers

Answer:

CE

Step-by-step explanation:

The smallest side is opposite the smallest angle.

The smallest side is CE

A river has a normal depth of 10 feet. After a rain storm, the river is rising a 1.5 feet per hour. What is the river's depth after 4 hours?

Answers

Answer:

The answer is 16 feet

Step-by-step explanation:

You do 1.5 feet times 4 hours and you get 6 feet and than you add 10 and 6 and you get 16 feet after 4 hour.

Express the area of the entire rectangle. Your answer should be a polynomial in standard form, (x+4) (x+5)
Area=​

Answers

Answer:

[tex]x^{2}[/tex] + 5x + 20

Step-by-step explanation:

(x+4) (x+5)

Expand

x^2 + 5x + 4x + 20

Simplify

[tex]x^{2}[/tex] + 5x + 20

Hope that helps!

#8

Please help
Extra 100 points
And brainliest

Answers

Answer:

When x < 0 (Option 1)

Step-by-step explanation:

The answer to your question would be Option 1, or when x < 0. When you create a table with f(x) and g(x), they're only ever equal when x = 0, which is when f(x) and g(x) both equal 1. When the numbers go into negatives for each equation, f(x) becomes exponentially bigger. Making f(x) > g(x) true when x < 0.

Hope this helps!

i'll give the crown thing if I can

Answers

Answer:

i) p = 4

ii) p = 8

iii) p = 12

Step-by-step explanation:

First of all, we have the general relation as follows;

c = 2.79p

i) 2.79p = 11.16

p = 11.16/2.79

p = 4

ii) 2.79p = 22.32

p = 22.32/2.79

p = 8

iii) 2.79p = 33.48

p = 33.48/2.79

p = 12

Help please, also this is khan academy

Answers

Answer:

A

Step-by-step explanation:

Yoy get A by combining like terms.

Sandy invest $35,000 into a business. If she on 16% of the business, what is the total work for business?

Answers

5600 I think although I don’t understand completely what the question is aski by

i just want some help please :( I’m tired of all these links .

Answers

Area of square is base times height my skills in math can only help you with this sorry

I’ll give brainlist to whoever answer correct. Do not give any links or answer for points

Answers

Answer:

length L = [tex]\sqrt[2]{18}[/tex] or [tex]3\sqrt{2}[/tex]

slope = 45 degree

neither

Step-by-step explanation:

Holaaa alguien me puede ayudar
¿Cuál es el valor de “x e “y” en la ecuación?
Es por el sistema de Reduccion

Answers

Answer:

x=10-y

Step-by-step explanation:

PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!

Write the decimal as a fraction.

Answers

1.27 is 127/100 as a fraction I’m not if that’s what you needed but hope it helped
Hey there !
Refer to the pic above !

I don't understand what to do here. Can someone please explain?
Please show all of your steps in your answer.

Parallelogram PQRS is shown in the coordinate plane below. What is the perimeter of parallelogram PQRS?

Answers

Answer:

42

Step-by-step explanation:

Opposite sides of a parallelogram are congruent

You need to find the distance between Q(6, 6) and R(1, -6) using the distance formula.  

PS = QR = [tex]\sqrt{(6 - 1)^{2} + (6 + 6)^{2} }[/tex]

     = [tex]\sqrt{5^{2} + 12^{2} } = \sqrt{25 + 144} = \sqrt{169} = 13[/tex]

PQ = SR = 8

Perimeter = 13 + 13 + 8 + 8 = 42

% of $10 = $3


help pls ​

Answers

Answer:

30%

Step-by-step explanation:

3/10=30/100 and 30/100 is the same as 30%

because %'s mean out of 100 so 30% means 30 out of 100 which can be simplified to 3 out of 10 or 3/10 (so its all equal)

Answer:

3%

Step-by-step explanation:

Section 25 Exercise's
Practice and Application Exercises
In Exercises 1–54, express each probability as a fraction reduced to
lowest terms.
In Exercises 1-10, a die is rolled. The set of equally likely outcomes
is (1,2,3,4,5,6). Find the probability of rolling
1. a 4.
2. a 5.
3. an odd number.
4. a number greater than 3.
5. a number less than 3.
6. a number greater than 4.
7. a number less than 20.
8. a number less than 8.
9. a number greater than 20.
10. a number greater than 8.

Answers

Djejshshshajkshwbshsnajajahahahanananan

the questions are in the pictures


REAL ANSWERS ONLY PLEASE :) thank you

Answers

the Anser un the Fire one is B and the answer on the 2nd one is A

See image for question and answer choices

Answers

Answer:

B.

Step-by-step explanation:

So, lets remember a few things first.

#1: The formula for finding the answer is A^2+B^2=C^2

#2: A is the opposite side, B is the adjacent side, and C is the hypotenouse side.

Now lets plug in what we already know, and see if we canf igure out the annswer:

A^2+12^2=13^2

Now I am going to stop us here. This is your equation that will find the answer. In your question, they use x^2, A^2 is a variable you can use instead. But looking at this, answer B and my equation I wrote above are exactly the same.

If you want, here is how I further solved it, this might give you a better grasp on what to do for future problems:

Ok, not  too bad, the A is the unkown value, which is the opposite side.

Now, how do we figure this out? Well, we just need to sovle for A.

To do this, lets clean up our equation by first sqauring all the values(except for the unkown):

A^2+144=169

Ok, that looks better, now lets just subtract the adjeacent side(b), which is 144, from the hypotenouse side(c), which is 169.

This will now look like:

A^2=25(169-144=25)

Ok, just one more step to go. Just square root both sides of the equation, this way, we will get ride of the ^2 on A(opposite side), and get A alone.

([tex]\sqrt{A^2}=A[/tex])=([tex]\sqrt{25}=5[/tex])

A=5

This is your answer.

Find the value of x by finishing solving the system shown below.

Answers

Answer:

x = 10

Step-by-step explanation:

Since both equations give y in terms of x, equate the right sides

3x - 28 = - 2x + 22 ( add 2x to both sides )

5x - 28 = 22 ( add 28 to both sides )

5x = 50 ( divide both sides by 5 )

x = 10

Select each expression that is equivalent to 3/16 if x = 3/4
I need an answer ASAP.
A. 2x+1/16
B.3/4 to the power of 2 - 6/16
D. x-1/4
E 2x-x2-3/4

Answers

Answer:

Step-by-step explanation:

B

Please help with this will mark you brainliest

Answers

Answer:

choose to places and with this formula, you can find it easily;

(y_2 - y_1)/(x_2 - x_1)

first place can be (1, 3) and the second can be (2,5):

5-3/2-1 =2

and it would be 2

Does this question have any correct answer? I can't see how any of the answer choices are correct.

Answers

Answer:

the only one that would make sense is D because it says 1 pair of parallel and the left one only has one pair

Step-by-step explanation:

(you might want to ask your teacher though because its kind of misleading)

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