## (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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