I need help with this.

Question

In a large population of adults, the mean IQ is 123 with a standard deviation of 17. Suppose 60 adults are randomly selected for a market research campaign. (Round to 2 decimal places for all z-values and round all other answers to 4 decimal places, if needed.)

(a) The distribution of IQ is (b1)

(b) The distribution of the sample mean IQ is (b2) with a mean of _____ and a standard deviation of ______.

(c) The probability that the sample mean IQ is less than 120 is ______.

(d) The probability that the sample mean IQ is greater than 120 is _______.

(e) The probability that the sample mean IQ is between 120 and 128 is ______.

(b1) options: approximately normal/exactly normal/may or may not be normal/certainly skewed

(b2) options: approximately normal/exactly normal/not normal/skewed left/skewed right

Answer 1

Multiple questions, same time, same skill set. Response sent.