Question

Marketers believe that 93% of adults in California own a cell phone. A cell phone manufacturer believes that number is actually lower. 220 Californians are surveyed, of which 90% report having cell phones. Use a 1% level of significance to test the manufacturer’s hypothesis. (6 points) a. H0 : b. Ha : c. What is the test statistic? d. What is the p-value? e. Indicate the correct decision, reason for it, and write an appropriate conclusion using complete sentences. i. α = ii. Decision: iii. Reason for decision: iv. Conclusion: f. According to the hypothesis test you conducted using this survey data, is there evidence to support the manufacture’s hypothesis that fewer than 93% of Californians own cell phones? (Please give a yes/no answer.)

Answer 1