7.54 Juvenile Diabetes Treatment Exercise 2.22 introduces an experiment in which 76 children at high risk for juvenile diabetes are randomly assigned to receive either a new drug (teplizumab) or a placebo as a control. Whether or not the children developed juvenile diabetes was recorded, and the results are shown in Table 7.39. Conduct a 2 test for association to see of the drug and the outcome are associated. Use a 5% significance level.

Juvenile diabetes treatment Diabetes No diabetes Total Teplizumab 16 22 38 Control 26 12 38 Total 42 34 76

Table 7.39 (Control, Disagree) cell

Strongly Agree Agree Neutral Disagree Strongly Disagree Control 40 50 5 15 10 Treatment 60 45 10 5 0

1. Select the correct alternative hypothesis.

Group of answer choices

1. H_a: There is not an association between the drug and the outcome.

2. H_a: There is an association between the drug and the outcome.

3. H_o: There is not an association between the drug and the outcome.

4. H_o: There is an association between the drug and the outcome.

2. What is the expected value for the number of children who took Teplizumab and did not develop juvenile diabetes?

3. What is the value of the test statistic? Round your answer to four decimal places.

4. Can we conclude the drug and outcome are associated? Why?

Group of answer choices

1. No, because we did not reject the null hypothesis

2. Yes, because we did not reject the null hypothesis

3. Yes, because we rejected the null hypothesis

4. No, because we rejected the null hypothesis