Consider the following competing hypotheses: Hou = 0, HA:H #0. The value of the test statistic is z= -1.66. If we choose a 1% significance level, then we Multiple Choice O do not reject the null hypothesis and conclude that the population mean is significantly different from zero O do not reject the null hypothesis and conclude that the population mean is not significantly different from zero O reject the null hypothesis and conclude that the population mean is not significantly different from zero O reject the null hypothesis and conclude that the population mean is significantly different from zeroThe owner of a large car dealership believes that the financial crisis decreased the number of customers visiting her dealership. The dealership has historically had 890 customers per day. The owner takes a sample of 100 days and finds the average number of customers visiting the dealership per day was 840. Assume that the population standard deviation is 290. The value of the test statistic is Multiple Choice O Z = 1.724 O t99 = -1.724 O Z= -1.724 O tgg = 1.724A newly hired basketball coach promised a high-paced attack that will put more points on the board than the team's previously tepid offense historically managed. After a few months, the team owner looks at the data to test the coach's claim. He takes a sample of 49 of the team's games under the new coach and finds that they scored an average of 94 points with a standard deviation of 6 points. Over the past 10 years, the team had averaged 92 points. What is the value of the appropriate test statistic to test the new coach's claim at the 1% significance level? Multiple Choice O Z = 0.33 O z= 2.33 O t48 = 2.33 O t48 = 0.33