Use the following narrative to answer questions 9– 13. At a…
Use the following narrative to answer questions 9– 13. At a major credit card bank, the percentages of people who historically apply for the Silver, Gold, and Platinum cards are 60%, 30%, and 10%, respectively. A random sample of 175 customers who responded to a recent promotion yielded 90 who applied for a Silver card, 50 who applied for a Gold Card, and 35 who applied for a Platinum card. You wish to determine if the sample provides evidence that there has been a change in preferences for the 3 types of cards. Question 9 Write the null hypothesis in proper form.