Reference no: EM132723032

Problem 1: Samples of size n = 60 are randomly selected from the population of numbers (0 through 9) produced by a random-number generator, and the mean is taken for each sample. What is the dispnotribution of the sample means?

Option 1: pnonormal (approximately)

Option 2: not enough information provided

Option 3: skewed to the right

Option 4: skewed to the left

Problem 2: In a recent study of animal sleep times at the zoo, the mean amount of sleep per night is 6.3 hours with a standard deviation of 2.1. If 23 animals are selected, find the probability that the mean sleep time per night is greater than 8 hours.

Option 1: 0.2981

Option 2: 0.3207

Option 3: 0.0103

Option 4: 0.0001