Se a standard normal table to find the z-score that corresponds to

Question 1 Provide an appropriate response.
Use a standard normal table to find the z–score that corresponds to the cumulative area of 0.7019.

[removed]	A.	0.835
[removed]	B.	-0.835
[removed]	C.	-0.53
[removed]	D.	0.53

 

Question 2  Provide an appropriate response   Find the z–score that has 84.85% of the distribution’s area to its right.

[removed]	A.	-0.39
[removed]	B.	-1.03
[removed]	C.	0.39
[removed]	D.	1.03

 

Question 3  Provide an appropriate response Find the z–scores for which 90% of the distribution’s area lies between –z and z.

[removed]	A.	(–0.99, 0.99)
[removed]	B.	(–2.33, 2.33)
[removed]	C.	(–1.645, 1.645)
[removed]	D.	(–1.96, 1.96)

 

Question 4  Provide an appropriate response.Assume that the heights of women are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches. If 100 women are randomly selected, find the probability that they have a mean height greater than 63.0 inches.

[removed]	A.	0.9918
[removed]	B.	0.0082
[removed]	C.	0.2881
[removed]	D.	0.8989

Question 5 Provide an appropriate response.
Assume that blood pressure readings are normally distributed with a mean of 115 and a standard deviation of 8. If 100 people are randomly selected, find the probability that their mean blood pressure will be less than 117.

[removed]	A.	0.0062
[removed]	B.	0.8615
[removed]	C.	0.8819
[removed]	D.	0.9938

 

Question 6  Provide an appropriate response.
Find the z–score that corresponds to the given area under the standard normal curve.

 

[removed]	A.	z = 0.42
[removed]	B.	z=0.40

 

Question 7  Provide an appropriate response.The scores on a mathematics exam have a mean of 70 and a standard deviation of 5. Find the x–value that corresponds to the z–score 2.33.

[removed]	A.	72.3
[removed]	B.	58.4
[removed]	C.	75.0
[removed]	D.	81.7

Question 1  Provide an appropriate response.
For the standard normal curve, find the z–score that corresponds to the 90^th percentile.

[removed]	A.	1.28
[removed]	B.	1.52
[removed]	C.	0.28
[removed]	D.	2.81

 

Question 2  Provide an appropriate response.
Assume that the salaries of elementary school teachers in the United States are normally distributed with a mean of $37,000 and a standard deviation of $5000. What is the cutoff salary for teachers in the bottom 10%?

[removed]	A.	$28,775
[removed]	B.	$30,600
[removed]	C.	$45,225
[removed]	D.	$43,400

 

Question 3  Provide an appropriate response.Assume that the salaries of elementary school teachers in the United States are normally distributed with a mean of $29,000 and a standard deviation of $2000. What is the cutoff salary for teachers in the top 10%?

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Question 4  Provide an appropriate responseFind the z–score that is greater than the mean and for which 70% of the distribution’s area lies to its left.

[removed]	A.	0.47
[removed]	B.	0.81
[removed]	C.	0.53
[removed]	D.	0.98

 

Question 5  Provide an appropriate response.
Find the z–score that has 84.85% of the distribution’s area to its right.

[removed]	A.	-1.03
[removed]	B.	1.03
[removed]	C.	-0.39
[removed]	D.	0.39

 

Question 6  Provide an appropriate response.The average number of pounds of red meat a person consumes each year is 196 with a standard deviation of 22 pounds (Source: American Dietetic Association). If a sample of 50 individuals is randomly selected, find the probability that the mean of the sample will be greater than 200 pounds.

[removed]	A.	0.8815
[removed]	B.	0.0985
[removed]	C.	0.7613
[removed]	D.	0.9015

 

Question 7  Provide an appropriate response.
Find the z–score for which 99% of the distribution’s area lies between –z and z.

[removed]	A.	(–1.645, 1.645)
[removed]	B.	(–2.33, 2.33)
[removed]	C.	(–1.28, 1.28)
[removed]	D.	(–2.575, 2.575)

 

Question 8  Provide an appropriate response.The distribution of room and board expenses per year at a four–year college is normally distributed with a mean of $5850 and standard deviation of $1125. Random samples of size 20 are drawn from this population and the mean of each sample is determined. Which of the following mean expenses would be considered unusual?

[removed]	A.	none of these
[removed]	B.	$6180
[removed]	C.	$5180
[removed]	D.	$6350

Question 1  Provide an appropriate response. Use a standard normal table to find the z–score that corresponds to the 80^th percentile.

[removed]	A.	2.41
[removed]	B.	1.405
[removed]	C.	0.84
[removed]	D.	0.2

 

Question 2  Provide an appropriate response.The average number of pounds of red meat a person consumes each year is 196 with a standard deviation of 22 pounds (Source: American Dietetic Association). If a sample of 50 individuals is randomly selected, find the probability that the mean of the sample will be less than 200 pounds.

[removed]	A.	0.9015
[removed]	B.	0.0985
[removed]	C.	0.7613
[removed]	D.	0.8815

 

Question 3  Provide an appropriate response.The scores on a mathematics exam have a mean of 70 and a standard deviation of 5. Find the x–value that corresponds to the z–score 2.33.

[removed]	A.	81.7
[removed]	B.	75.0
[removed]	C.	58.4
[removed]	D.	72.3

 

Question 4 Provide an appropriate response.Assume that the heights of men are normally distributed with a mean of 69.5 inches and a standard deviation of 2.1 inches. If 36 men are randomly selected, find the probability that they have a mean height greater than 70.5 inches.

[removed]	A.	0.9005
[removed]	B.	0.8188
[removed]	C.	9.9671
[removed]	D.	0.0021

 

Question 5  Provide an appropriate response.Find the z–score for which 70% of the distribution’s area lies to its right.

[removed]	A.	–0.47
[removed]	B.	–0.98
[removed]	C.	–0.81
[removed]	D.	–0.53