Hypothesis Testing Question:

Samsung is researching whether to introduce a new type of mobile phone. If more than 65% of the population likes the plan then they will introduce it. Define the null and alternative hypotheses in this situation. Should this be a one-tailed or two-tailed test? Why? What is the critical Z value that should be used? Given the data below should the null hypothesis be rejected? What marketing action should Samsung take, if any?

Test Statistic Z (calculated) =Sample p = 77% (0.77)Sample _p= 0.065

Z_critical(@ .95) = 1.645Z_critical(@ .975) = 1.96