Will improving customer service result in higher stock prices for the companies providing the better service?"whenis company's sachifaction spurs has improved over the price rears masuits ing Is above the national average (75.6), abucket show its shares have a good chance of outperforming the broad stock market in the long run." The following cripaction score of three companies for the with quarters of the previous years wire obtained from an tosham's indication Assume that fixed scores and based on a pol of Co customment from each company. Decours the polling hat been done for several years, the standard deviation can be atturned to equal & points in each cate Company Company A Company H 77 Company C(#) For Company A, Is the increase in the satisfaction score from year 1 to year 2 statistically significant? Use w = 0.05. (Let u, = the satisfaction score for year 2 and the satisfaction score for year 1.) State the hypotheses. HINCHDO O O O Calculate the test statistic. (Round your answer to two decimal places ) Calculate the prvalue. ( Round your answer to four decimal places.)(b) Can you conclude that the year 2 score for Company A is above the national average of 75.8? Use a = 0.05. State the hypotheses. O Ho: u 2 75.8 H : u 75.8 Calculate the test statistic. (Round your answer to two decimal places.) Calculate the p-value. (Round your answer to four decimal places.) p-value =(c) For Company B, is the increase from year 1 to year 2 statistically significant? Use a = 0.05. (Let j, w the satisfaction score for year 2 andy, . the satisfaction score for year 1) State the hypotheses H OOH-N 20 Calculate the best statistic. ( Round your answer to two decimal places.) Calculate the p-value, (Round your answer to four decimal places.)[d) When conducting a hypothesis test with the values given for the standard deviation, sample size, and a, how large must the increase from your I to year 2 be for $ to be statistically significant? (Round your answer to two decimal places.) (a) Use the result of part (d) to state whether the increase for Company C from year 1 to year 2 is statistically significant The increase from Year 1 to Year 2 for Company C| is not. ww statistically significant