To determine if there is a difference between the investing preferences of mid-level managers working in the public and private sectors in a certain city. A random sample of 320 public-sector employees and 380 private-sector employees was taken. The sampled participants were then asked about their retirement investment decisions and classified as being either "aggressive," if they invest only in stocks or stock mutual funds, or "balanced," if they invested in some combination of stocks, bonds, cash, and other. The results are available below. Complete parts a and b below. Click the icon to view the results of the study. B. Ho: The mean employment sector is equal to the mean investing preference. HA: The mean employment sector is not equal to the mean investing preference. C. Ho: Employment sector is independent of investing preference. i Study results Full data set HA: Employment sector is not independent of investing preference. Aggressive D. Ho: The mean employment sector for each investing preference is equal. Public Private 166 Balanced 154 236 144 HA: At least one mean for an employment sector is not equal to the others. The test statistic is. Print Done (Round to two decimal places as needed.) Enter your answer in the answer box and then click Check Answer. The billing department of a national cable service company is conducting a study of how customers pay their monthly cable bills. The cable company accepts payment in person at a local office, by mail, by credit card, or by electronic funds transfer from a bank account. The cable company randomly sampled 400 customers to determine if there is a relationship between the customer's age and the payment method used. The accompanying sample results were obtained. Based on the sample data, can the cable company conclude that there is a relationship between the age of the customer and the payment method used? Conduct the appropriate test at the a=0.01 level of significance. Click the icon to view the sample data. MA: At least one mean for a payment method is not equal to the others. C. Ho: Customer's age is normally distributed. HA: Customer's age is not normally distributed. D. Ho: Customer's age is independent of payment method. HA: Customer's age is not independent of payment method. Calculate the test statistic. The test statistic is (Round to two decimal places as needed.) Enter your answer in the answer box and then click Check Answer. Sample data Payment Method In Person By Mail Full data set Age of Customer 20-30 31-40 41-50 Over 50 9 12 11 13 28 67 71 56 By Credit Card 25 19 5 6 By Funds Transfer 22 34 17 5 Print Done