Reconsider the previous question about the average number of states all students at the author’s school have visited. Recall that in the author’s sample of 50 students the average number of states the students had visited was 9.48 and the standard deviation was 7.13.
a. Use the Theory-Based Inference applet to find a 95% confidence interval for the average number of states all students at the author’s school have visited.
b. Does the 95% confidence interval that you have reported in part (a) provide evidence that the average number of states all students at the author’s school have visited is different from 16?
c. In the context of this study, was it valid to use the theory-based (t-distribution) approach to find a confidence interval? Explain your reasoning.