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Gemiola [76]
3 years ago
13

Based on a recent study, roughly 80% of college students in the U.S. own a smartphone. Is the proportion of smartphone owners lo

wer at this university? Respond to each of the following in your initial post.
1. State your hypotheses in symbolic form and in words. (The following should be clear in your answer: the population of interest and the meaning of the proportion p in terms of the variable Cell.)
2. StatCrunch uses a normal model to estimate the P-value probability. Verify that normality conditions are met.
3. Use StatCrunch to conduct the hypothesis test. (directions) Copy and paste the results (the StatCrunch output window) into your initial post.
4. Give your P-value and interpret its meaning as a conditional probability.
5. State a conclusion that answers the research question. Use a significance level of 5%. (Your answer should include the P-value and reference the population and the variable Cell.)
Mathematics
1 answer:
kumpel [21]3 years ago
5 0

Answer:

PLSSSSSSS do you own work chile LOLLLLLL

Step-by-step explanation:

BYE- LOLLLLLLL PLS

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Real estate ads suggest that 56 % of homes for sale have​ garages, 27 % have swimming​ pools, and 16 % have both features. ​a) W
Marizza181 [45]

Answer:

a) 0.4

b) 0.28

c) The events are not independent

d) The events are not mutually exclusive

Step-by-step explanation:

Hi!

Lets call:

Gar = {homes with garage}

Pool = {homes with pool},  

A = {homes with pool and garage}  = Gar ∩ Pool

The data we are given is:

P(Gar) = 0.56

P(Pool) = 0.27

P(A) = 0.16

a) B = {homes with garage but not pool}. This set B is the set Gar without set A: B = Gar / A  

P(B) = P(Gar) - P(A) = 0.4

b) This is a conditional probability:

P(Pool | Gar) = P(Gar ∩ Pool) / P(Gar) = 0.16/0.56 = 0.28

c) To be independent events, it must be, by definition:

P(Gar ∩ Pool) = P(Gar) * P(Pool)

0.16 ≠ 0.56*0.27 = 0.15

Then, the events Gar and Pool are not independent

d) Gar and Pool are not mutually exclusive, because there are houses with both pool and garage. We know that because P(A) is not zero.

5 0
3 years ago
The difference between 2 numbers is 26 and one number is 3 Times the other​
Aleks04 [339]

Answer:

Let the numbers be

x \: and \: 3x

Then,

ATQ

3x - x = 26

2x = 26

x = 13

3x = 39

3 0
2 years ago
36 is 8 3/4% of what number?
irga5000 [103]

Answer:

28.8 or 28 8/10

Step-by-step explanation:

A percentage is out of 100. We have to convert 8 3/4 into a percentage. 8 3/4 can also be written as an improper fraction 35/4. Now we have to make the denominator 100. We already knoe that 4 multiplied by 25 equals 100, then we do the same to the numerator. 35 multiplied by 25 gets us to 125. Now we got 125/100. Now since we converted the fracrion into a percentage, now what we do is divide 36 by 125% and that will get you to 28.8 or 28 8/10.

To double check your answer, you can multiply 28.8 by 125% and you will get 36.

4 0
3 years ago
A cyclist travels 54 miles in 4 hours. Use dimensional analysis to convert the cyclist's speed to feet per second. Round your an
diamong [38]

Answer: feet is 13.5 14400 seconds which is 4 hours

I hope im right

Step-by-step explanation:

8 0
3 years ago
What is y - 3y please ​
tatyana61 [14]

Answer:

<u>=-2y</u>

Step-by-step explanation:

y-3y

<u>=-2y</u>

5 0
2 years ago
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