hw 8 question 10, please answer part a and b

Question

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 400 subscribers. The results indicate that 99 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.

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?

B. How would the manager in charge of promotional programs concerning residential customers use the results in (a)?

Answer 1

Hi Ruman A.,

You've asked 6 questions, on the same topic, at the same time. That's spamming. And thus you won't get tutoring help to do your entire problem set for you. That's not the purpose of Ask-an-Expert.