1. Assume that the results of a yes/no survey question given to a random sample
ID: 3248372 • Letter: 1
Question
1. Assume that the results of a yes/no survey question given to a random sample of male and female subjects are summarized in a 2 × 2 two-way table. Use the given values of the test statistic and the significance level to test for independence between gender and response.
Given a test statistic of 2 = 3.4 and a significance level = 0.01, decide whether gender and response are related or not related.
B. not related
D. H0: Age at retirement and career are independent.
Ha: There is some relationship between age at retirement and career.
D. 17
D. 1.978
A. relatedB. not related
2. Determine the null and alternative hypotheses for the study that produced the data in the table.
A researcher performed a study to determine whether an association exists between retirement age and career. She obtained the following sample data.
Ha: Age at retirement and career are independent. B. H0: Age at retirement and career are independent.
Ha: There is no relationship between age at retirement and career. C. H0: There is some relationship between age at retirement and career.
Ha: Age at retirement and career are not independent.
D. H0: Age at retirement and career are independent.
Ha: There is some relationship between age at retirement and career.
3. Calculate the indicated expected frequency to the nearest whole number.
The two-way table summarizes data from a survey at a small liberal arts college:
New Hires
Assuming that status and gender are independent, what is the expected frequency of adjunct women?
D. 17
4. Find the value of the 2 test statistic for a hypothesis test of independence. Round your answer to 3 decimal places.
Tests for adverse reactions to a new drug yielded the results given in the table.
D. 1.978
5. Using a significance level of 0.05, test the claim that the two variables are independent. State whether the variables are related or not related.
Tests for adverse reactions to a new drug yielded the results given in the table.
Explanation / Answer
1) for 1 degree of freedom and 0.01 level critical value =6.6349
as chi stat is lower then critical value
B. not related
2)D. H0: Age at retirement and career are independent.
Ha: There is some relationship between age at retirement and career
3)expected frequency of adjunct women =34*40/79=17.215 option D
4)
option A)
5)
A. not related
Observed O Drug plaacebo Total headaches 11 7 18 No 'headaches 73 91 164 Total 84 98 182 Expected E=rowtotal*column total/grand total Drug plaacebo Total headaches 8.308 9.692 18 No 'headaches 75.692 88.308 164 Total 84 98 182 chi square =(O-E)^2/E Drug plaacebo Total headaches 0.873 0.7479 1.620 No 'headaches 0.096 0.082 0.178 Total 0.968 0.830 1.7982Related Questions
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