Step-by-step explanation:
5(2a - 6) + 3a
10a - 30 + 3a
13a - 30
right
A researcher wants to determine if college students typically drink more than 3 times per week. She collects data on 125 college students. From the sample, she finds that they drank an average of 3.5 times per week, with a standard deviation of 2.3 drinks. Use a 5% significance level for any testing. Based on the scenario above, which of the following is TRUE regarding the type of test that would need to be performed?
a. It is a two-tailed test.
b. It must be completed using the critical value approach.
c. It is a one-tailed test.
d. We reject the null and prove our claim.
e. We would need to estimate the significance level from the data.
f. Hypothesis testing cannot be performed on percentages.
Answer:
C: It is a one-tailed test.
Step-by-step explanation:
We are told the researcher wants to determine if college students typically drink more than 3 times per week.
This means the null hypothesis is;
H0: μ ≥ 3
this indicates that it's a one tailed test as the null hypothesis is only to the right side of 3 and thus just one tail.
This question will be solved using p-value approach since we are given population mean, sample mean, sample size and standard deviation.
We can't reject the null without finding out the p-value and seeing if it is less than the significance value given.
Hypothesis testing can be done done proportions or percentages.
Thus, the correct option is one-tailed test.
Please answer this correctly without making mistakes I want ace expert and genius people to answer this correctly without making mistakes
Answer:
1244 Pounds 2 Ounces
Step-by-step explanation:
1 pound = 16 ounces
4 divides into 4976 evently
Twice a number increased by 43 is greater than one-fourth the number increased by 88. Which inequality can be used to determine the number?
2x + 43 > 4x + 88
2x+43>x/4+88
2x+43>x/4-88
2x+43
The required inequality is given as 2x + 43 > x/4 + 88. Option B is correct.
What is inequality?Inequality can be defined as the relation of the equation containing the symbol of ( ≤, ≥, <, >) instead of the equal sign in an equation.
Here,
Let the number be x,
According to the question,
Twice a number increased by 43 is greater than one-fourth the number increased by 88.
2x + 43 > x/4 + 88
Thus, the required inequality is given as 2x + 43 > x/4 + 88. Option B is correct.
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PLEASE ANSWER THIS QUESTION RIGHT.The height of Ryan's rocket is represented by the table of values h(t) below, where t represents time in seconds.
Part A:What is the maximum height of the rocket reached?
A.146 feet
B.128 feet
C.100 feet
D.68 feet
Part B: how long did it take for the rocket to reach the ground?
A.1.5 seconds
B.2 seconds
C.4.5 seconds
D.1 second
Jane and five friends go on a camping holiday together for a week,
The 6 friends will share the costs of the holiday equally.
Here are the costs of the holiday.
£216 for 6 return coach tickets
£404 for the campsite
£316 for hire of a tent for a week
Work out how much Jane has to pay for her share of the costs.
Answer:
Jane's share of the cost is £156
Step-by-step explanation:
Since the cost is to be shared equally amongst the 6 friends, to get the amount to be paid by Jane, we must work out the total cost to be incurred first.
Total cost = £216 + £404 + £316
= £936
Since there are 6 friends willing to bear this cost equally, the amount to be paid by Jane
= £936/6
= £156
A community center with 700 members has
56 teenage members. What percentage of the
members are NOT teenagers?
A) 92%
B)56%
c)0.08%
D) 644%
GYENES
TI
??
Answer:
b. 56%
Step-by-step explanation:
A magazine publisher is informed that 72% of subscribers last year did not renew their subscriptions. This publisher wants to randomly survey 8% of these past subscribers asking the reason why they did not renew their subscriptions. All of last year's subscribers who did not renew their subscriptions are known collectively as what
Answer:
Sampling frame
Explanation:
A sampling frame is the source where the researcher draws his samples from. In other words, a sampling frame is like the population where the researcher gets samples for his investigation. In the above example, we are told the researcher wants to know why the 72% that subscribed last year didn't subscribe this year. He draws a sample of 8% from the 72% that he is trying to study, therefore the 72% are the sampling frame from where he gets his sample.
Please tell me weather it’s true or fade for each one please!
Answer:
False, true, true, false, false
Step-by-step explanation:
Which angle pairs are supplementary? Check all that
apply.
3
6
4
5
21 and 22
0 24 and 23
24 and 25
27 and 25
23 and 26
2.
7 8
Answer:
Option B, C and E are supplementary angles.
Step-by-step explanation:
We need to find supplementary angles.
Supplementary angles are those angles who sum up to 180 °.
I have attached picture for reference.
Looking at the figure given:
We have supplementary angles:
∠4 and ∠3∠4 and ∠5∠5 and ∠6∠7 and ∠8∠3 and ∠6But the options given are: ∠4 and ∠3,∠4 and ∠5, ∠3 and ∠6
So, Option B, C and E are supplementary angles.
The angle pairs that are supplementary are <4 and 3, <4 and 5 and <3 and <6.
What are supplementary angles?A supplementary angle is an angle that add up to 180 degrees. For example 100 and 80 degrees are supplementary angles.
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The sum of two numbers is 240. If one number is twice the other number, find the two numbers.
Answer:
The sum of two numbers is 240. The larger number is 6 less than twice the smaller. Find the numbers.
----------
Let the smaller be "x" ; Larger is "2x-6"
EQUATION:
x + 2x-6 = 240
3x= 246
x = 82 (smaller)
2x-6 = 158 (larger)
Step-by-step explanation:
Answer:
160 and 80
Step-by-step explanation:
Ruben gets $9 allowance each week. He wants to save 4% of this. How much money will he save each week?
Answer:
0.45 cents
Step-by-step explanation:
I think
Answer:
Ans: 9 ÷ 100 × 4 = 0.09 × 4 = 0.036$
1) All cars are blue. (2) All pigs have wings. Therefore, (3) All buses have three wheels. Question 2 options: Passes the true premises test and passes the proper form test. Passes the true premises test and fails the proper form test. Fails the true premises test and passes the proper form test. Fails the true premises test and fails the proper form test. None of the above.
Answer:
Fails the true premises test and fails the proper form test
Explanation:
A valid argument must pass the true premises test and the proper form test.
True premises test checks to see if what the premises is saying is true about the world, example- pigs do not have wings and so the argument fails the true premises test. Proper form test assumes the premises is true and then checks to see if a valid conclusion was drawn based on the premises(even though it might fail the true premises test and may not be true about the world)
Can someone please help me ?????
Answer: 52
Step-by-step explanation:
is that all there is to it? just simply adding up 12 + 32 + 8, adding up the number of women who took the survey? if so, the answer is 52.
Sam has 35 rubbers.He wants to share them equally between 3 of his friends .How many will each friend receive?How many are left over?
Answer:
11 will be shared out and there will be 2 rubbers left.
Step-by-step explanation:
the last number that 3 goes into before 35 is 33. 33 ÷ 3 = 11. So each friend gets 11 rubbers. then from 33, there will be 2 rubbers left.
I NEED HELP , TOO LAZY✋
Answer:
The median is 6
Step-by-step explanation:
First put the numbers in order: 3,4,4,4,5,7,7,8,9,12
Here, the 5th & 6th terms are 5 &7
So, median = 5+7/2
=12/2
=6
Answer:
6
Step-by-step explanation:
For funding out the median firstly we need to arrange the data in ascending or descending order . Here on arranging the given data in ascending order we have ,
3,4,4,4,5,7,7,8,9,12The median is the middle most observation , in case of odd nos . And the mean of two middlemost observations in case of even nos . Here the number of data is even , and the two middlemost observations are 5 and 7 , so ,
=> Median = x₁ + x₂ / 2
=> Median = 5 + 7/2
=> Median = 12/2
=> Median = 6
Hence the median of the given data is 6 .Is graphite all of the following?
Pure substance
Element
Compound
And Molecule
Pls help asap
Answer: Yes!
Step-by-step explanation:
Yes, graphite is composed of 100%carbon. With this, can we say that graphite is an element or compound of carbon? Compound is composed of two or more elements combined in a substance in definite proportions, in the form of molecules held together by chemical bonds.
Refer to the previous exercise. The researchers wanted a sufficiently large sample to be able to estimate the probability of preferring the new analgesic to within 0.08, with confidence 0.95. If the true probability is 0.75, how large a sample is needed to achieve this accuracy
Answer:
The large sample n = 117.07
Step-by-step explanation:
Step(i):-
Given that the estimate error (M.E) = 0.08
The proportion (p) = 0.75
q =1-p = 1- 0.75 =0.25
Level of significance = 0.05
Z₀.₀₅ = 1.96≅ 2
Step(ii):-
The Marginal error is determined by
M.E = [tex]\frac{Z_{0.05} \sqrt{p(1-p)} }{\sqrt{n} }[/tex]
[tex]0.08 = \frac{2 X \sqrt{0.75(1-0.75)} }{\sqrt{n} }[/tex]
Cross multiplication , we get
[tex]\sqrt{n} = \frac{2 X \sqrt{0.75(1-0.75)} }{0.08 }[/tex]
√n = [tex]\frac{2 X0.4330}{0.08} = 10.825[/tex]
squaring on both sides , we get
n = 117.07
Final answer:-
The large sample n = 117.07
A cyclist rides her bike at a speed of 12 miles per hour. What is this speed in kilometers per hour? How many kilometers will the cyclist travel in 5 hours? In your computations, assume that 1 mile is equal to 1.6 kilometers. Do not round your answers.
PLS HELP
Answer:
answers below :)
Step-by-step explanation:
Hi there!
with a ratio of 1:1.6, we can find these answers.
1. 19.2 km, multiply 12 by 1.6
2. 96. km, multiply 12 by 6 to find the total amount of miles traveled, then
multiply 60 by 1.6 to get 96.
I hope this helps!
how to go from the computer store, A, to the hardware store, C, on the map. Use words like left, right, up, down, north, south, east, and west. Each square on the coordinate plane is a city block.
A desk is on sale for $438, which is 27% less than the regular price.
What is the regular price?
Answer: $600
Step-by-step explanation:
The sale price is 27% less means $438 is equal to 73% of the original price. So to calculate the original price:
Original price = (438÷73) X 100
$ 600
The regular price of the desk is $600.
What is the percentage?The percentage is defined as a given amount in every hundred. It is a fraction with 100 as the denominator percentage is represented by the one symbol %.
The percentage is also called the indicating hundredths. Thus, 2% is two-hundredth, which means 2%=2/100=0.02.
Let's say the regular price of a desk = x
Then,
27% of x ⇒ 27 × x / 100 = 0.27x
So,
x - 0.27x = 438
0.73x = 438
x = 600
Hence "The regular price of the desk is $600".
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You are applying for graduate school at University A. In the past 42% of the applicants to this university have been accepted. It is also known that 70% of those students who have been accepted have had GMAT scores in excess of 550 while 40% of the students who were not accepted had GMAT scores in excess of 550. You take the GMAT exam and score 640. What is the probability that you will be accepted into the graduate school of university A
35/140= 5/x which number is equal to x?
Answer:
Step-by-step explanation:
Multiply both sides by 140 to get:
35 = 700/x
Multiply both sides by x:
35x = 700
x = 20
What is the total surface area of the square pyramid in square inches? *
11
11.5
7
Answer:
base edge? height?
Surface area of a square pyramid:
s = length of base edge.
h = height of pyramid from base to top.
A = surface area.
[tex] A \: = s² + 2s \sqrt{\frac{a^{2}}{4}+h^{2}}[/tex]
√ = square root, root of 2, opposite of square.
² = square, power of 2, times itself once.
√n × √n = n
n × n = n²
(Click the Picture for my question) and thank you!
Answer:
D
Step-by-step explanation:
By definition, π is defined to be the ratio of a circle's circumference to its diameter. In other words:
[tex]\displaystyle \pi=\frac{C}{d}[/tex]
In fact, if you multiply both sides by the diameter d, you can see that:
[tex]C=\pi d[/tex]
Which is the formula for circumference you've been commonly taught.
1. Write the linear equation for a line with a slope of 1/2 that goes through the point (-1,
0).
Answer:
uhuhhubuggyugyug
uiyuyuh
jhjhh
Step-by-step explanation:
y7gukgyfkjiyfikyutgikuygtujki
The sales tax for an item was $36.80 and it cost $460 before tax.
Find the sales tax rate. Write your answer as a percentage.
Answer:
16,928
Step-by-step explanation:
just solve it in calculation so you can see the answer
and remember study hard to go to bts concert joke to your dream
Alexander is a waiter. He gets paid $3.25 per hour plus tips based on his performance. Which expression represents Alexander's salary?
Answer:
f(x) = 3.25x + tips
x = hours
Step-by-step explanation:
Step-by-step explanation: We know how much Alexander gets paid ($3.25) but we don't know how many hours he works. So, the equation will contain a variable.
H will be our variable, it will represent hours.
Therefore, the answer is: f(h) = 3.25 + tips
Definitions:
Variable: A letter representing the unknown.
Equation: A mathecial setence.
Milani's teacher draws students names at random, calls on the student, and replaces the name so that students know they should always be prepared to respond. There are 20 students in Milani's class. Let X be the number of names it takes for the teacher to draw Milani's name. Find the probability that the teacher first draws Milani's name as the 7th name. You may round your answer to the nearest hundredth.
Answer: 0.04
Step-by-step explanation:
Khan
Answer: 0.04
Step-by-step explanation:
The quotient of a number (x) and 2 is 4
Answer: X = 2
Step-by-step explanation: because 2 * 2= 4
wei kiat is 4 times as old as hafiz. Find the ratio of Wei kiat's age to hafiz's age. pls help