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(Answered)-this is just a short little quiz that I don't know how to do


this is just a short little quiz that I don't know how to do


An observational study based on survey data concluded that individuals who took more

 

vitamin C were able to recover from the flu faster. You want to replicate this study using an

 

experimental approach. The treatment in this experiment might be:

 

Question 21 options:

 

how long it takes to recover from the flu, in days.

 


 

the change in body temperature over the period of the experiment.

 


 

the amount of vitamin C taken per day: 0 mg, 1000 mg, 2000 mg, or 3000 mg.

 


 

whether an individual took vitamin C in a pill form or liquid form.

 


 

You conduct a hypothesis test and find a P-value of .025. Which of the

 

following is true?

 

Question 22 options:

 


 

You can reject Ho at the .01 significance level.

 


 

You can reject Ho at the .05 significance level.

 


 

You can accept Ho at the .05 significance level.

 


 

You can say the probability that Ho is true at p = .025.

 


 

Which of the following is a necessary step in every hypothesis testing procedure using a test

 

statistic?

 

Question 23 options:

 


 

State the null and alternative hypotheses in the context of the problem.

 


 

Compute the test statistic and use it to find the p-value.

 


 

State a conclusion in context of the problem.

 


 

All of the above are steps in conducting a hypothesis test.

 


 

Compute a test statistic for a random sample with n = 23, s = 2.33, x(bar) = 15.5 for the

 

test Ho: ? =14.75, Ha: ? ? 14.75

 

Question 24 options:

 


 

1.54

 


 

1.96

 


 

2.074

 


 

1.717

 


 

Suppose a study showed that the four most popular pizzas are preferred in

 

the following percentages:

 


 

Topping

 


 

Perce

 

nt

 


 

Cheese 24

 

Pepper

 

32

 

oni

 

Sausag

 

29

 

e

 

Veggie 15

 


 

You decide to keep track of the next 150 pizzas of these types ordered at the

 

restaurant where you work to see if the percentages hold true. This is the

 

data you get at your restaurant:

 


 

Topping

 


 

Observed

 

Number

 


 

Cheese 41

 

Pepper

 

55

 

oni

 

Sausag

 

36

 

e

 

Veggie 18

 


 

Find the chi-square statistic and the associated P-value for a hypothesis test

 

where the null hypothesis is that the distribution of pizza toppings is as

 

reported in the study, and where the alternative hypothesis is that the

 

distribution of pizza toppings is different from that reported in the study.

 

Question 25 options:

 


 

X2 = 150.5, P = 0

 


 

X2 = 3.908, P = .419

 


 

X2 = 3.908, P = .097

 


 

X2 = 3.908, P = .272

 


 

 


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