Answer Happy

A cellphone provider has the business objective of wanting to determine the proportion of subscribers who would upgrade to a new cellphone with improved features if it were made available at a substantially reduced cost. Data are collected from a random sample of 500 subscribers. The results indicate that 121 of the subscribers would upgrade to a new cellphone at a reduced cost. Reducing the price will be profitable if at least 20% of the subscribers would upgrade. Complete parts (a) and (b) below. a. At the 0.05 level of significance, is there evidence that more than 20% of the customers would upgrade to a new cellphone at a reduced cost? Determine the null hypothesis, Ho, and the alternative hypothesis, Hy OB. He 0.20 H:#0.20 O A. H250.20 H:10.20 OC. H: 120.20 H<0.20 OD. Hi#0.20 H: 0.20 What is the test statistic? ZSTAT = Type an integer or a decimal. Round to two decimal places as needed.) What is the p-value? The p-value is (Type an integer or a decimal. Round to three decimal places as needed.) What is the final conclusion? the null hypothesis. There sufficient evidence that the percentage of people who would upgrade to a new cellphone at a reduced cost is 20% b. How would the manager in charge of promotional programs conceming cellphone upgrades use the results in (a)? The manager suggest reducing the price