Q1 Mary examined a random sample of Friday withdrawals from a college campus ATM. She hypothesized that the mean was less than $100. The results shown below are from MegaStat. What would Mary conclude from this test? Explain carefully.
Q2 Julia hypothesizes that fewer than 90 percent of her Visa purchases are under $100. She examines a random sample of her recent purchases, and performs a test. The results shown below are from MegaStat. What would Julia conclude from this test?
Q3 Based on some ideas expressed in her psychology class, Frieda decided to test a hypothesis about the possible relationship between political views and the number of traffic tickets received. She used a survey of 189 statistics students to prepare the cross-tabulation and chi-square analysis shown below. Discuss Frieda’s results using concepts you learned in this chapter. Note any potential problems or concerns in the analysis,and suggest possible improvements.
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