Do these data support, at the 0.05 level, the contention that the type of respondent (student, faculty, or
parent) is related to the opinion toward legalization? Is this a test of independence or a test of
homogeneity of proportions?Cumulative Review Problems
Use the computer output given below to answer Questions 1 and 2.
Based on the computer output above, what conclusion would you draw concerning H 0 : β = 0?
Justify your answer.
- Use the computer output above to construct a 99% confidence interval for the slope of the regression
line (n = 8). Interpret your interval. - If you roll two dice, the probability that you roll a sum of 10 is approximately 0.083.
a. What is the probability that you first roll a 10 on the 10th roll?
b. What is the average number of rolls until you first roll a 10? - An experiment is conducted by taking measurements of a personality trait on identical twins and then
comparing the results for each set of twins. Would the analysis of the results assume two independent
populations or proceed as though there were a single population? Explain. - The lengths and widths of a certain type of fish were measured and the least-squares regression line
for predicting width from length was found to be: 0.193 (length ). The graph that
follows is a residual plot for the data: