Re-Test Courtney wants to know if name-brand chocolate cookies contain more chocolate cl selects a random sample of 80 name-brand cookies and counts the number of choc chocolate chips is 18.54 with a standard deviation of 2.71. She does the same with cookies and finds they have a mean of 19.28 chips and a standard deviation of 2.89 Calculate the test statistic to see if the data provides convincing evidence at the a = chocolate chips in name-brand cookies is larger tha store-brand cookies. O -1.56 O -2.62