QUESTION 1

1. For a population of n =60 scores, X = 41 corresponds to z = +1.00 and X = 23 corresponds to z =-2.00. What are the values for the population mean and standard deviation?

		= 35 and = 6
		= 30 and = 6
		= 35 and = 11
		= 30 and = 11

QUESTION 2

1. What z-score values form the boundaries for the middle 72% of a normal distribution?

		z = +0.39 and z = -0.39
		z = +0.24 and z = -0.24
		z = +1.08 and z = -1.08
		z = +1.42 and z = -1.42

QUESTION 4

A jar contains 60 red marbles and 30 yellow marbles. Arandom samplewithout replacementof n = 6 marbles is selected from the jar. If the first five marbles are all red, what is the probability that the sixth marble will be yellow?

Write your answer as a fraction. Do not simplify

Enter numerator here

_____________

Enter denominator here ___________

QUESTION 13

1. Scores on an IQ test form a normal distribution with a mean of = 200 with = 100. If the state college only accepts students who score in the top 90% on the SAT, what is the minimum score needed to be accepted?

		X = 128
		X = 290
		X = 328
		X = 72