Kat is interested in getting chickens so she can have fresh eggs. Before she buys her chickens, she wants to find the mean number of eggs each one will lay. She begins by randomly selecting 40 chickens from a large poultry farm and
counts how many eggs each one lays within one month. She finds the mean to be 24.8 eggs with a standard deviation
of 6.9 eggs. Which of the following is the 90% confidence interval for the true mean number of eggs chickens from this
poultry farm lay in one month?
Find the t-table here.
O (21.85, 27.75)
O (22.59, 27.01)
O (22.96, 26.64)
O (23.38, 26.22)

If your score on your next statistics test is converted to a z score, which of these z scores would you prefer: minus2.00, minus1.00, 0, 1.00, 2.00? why? a. the z score of 2.00 is most preferable because it is 2.00 standard deviations above the mean and would correspond to the highest of the five different possible test scores. b. the z score of 0 is most preferable because it corresponds to a test score equal to the mean. c. the z score of minus2.00 is most preferable because it is 2.00 standard deviations below the mean and would correspond to the highest of the five different possible test scores. d. the z score of minus1.00 is most preferable because it is 1.00 standard deviation below the mean and would correspond to an above average