You wish to test the following claim (HaHa) at a significance level of α=0.10       Ho:μ=79.4       Ha:μ≠79.4 You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of size n=20 with a mean of x=87 and a standard deviation of s=13.6 a.) This test is a.)left tailed b.)right tailed c.)two tailed b.) At α=α=0.10, the critical value = ± (use 3 decimal places) c.) The test statistic =  (use 2 decimal places) d.) The test statistic is... in the critical region not in the critical region

Do you want to own your own candy store? Wow! With some interest in running your own business and a decent credit rating, you can probably get a bank loan on startup costs for franchises such as Candy Express, The Fudge Company, Karmel Corn, and Rocky Mountain Chocolate Factory. Startup costs (in thousands of dollars) for a random sample of candy stores are given below. Assume that the population of x values has an approximately normal distribution. 91, 178, 132, 97, 75, 94, 116, 100, 85 (a) Use a calculator with mean and sample standard deviation keys to find the sample mean startup cost x and sample standard deviation s. (Round your answers to one decimal place.) (b) Find a 90% confidence interval for the population average startup costs μ for candy store franchises. (Round your answers to one decimal place.)

The next five questions refer to the following scenario: • sample mean T = 10 • sample size n = 100 • population standard deviation O = 4

b.