Tab Assignment 4 [12] According to the data from call center about 900 contacted clients of the bank 650 declared as Lock that they want to have the limit on their credit cards higher than they currently have. One of the sales managers said that according to his view even 75% of clients of the bank dream of higher credit card limits, so the best idea is to give them what they want. Imagine you are a bit more skeptical and want to verify if the data from the survey confirms the opinion of the sales manager. a. Set the HO and Ha hypotheses to verify if it is really 75% against the hypothesis that it is less. [2] b. Conduct the test using a= 5% and interpret the results [6] c. How would the verification decision change if different (higher) a was used? [1] d. What does a mean in the test? [1]