# Ch. 5

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question
For any distribution, what is the z-score corresponding to the median? Cannot be determined from the information given 1 N 0

Explanation: 1N01N01z
question
Which of the following z-score values represents the location farthest from the mean? z = +1.00 z = +0.50 z = -1.00 z = -2.00
z = -2.00
question
What position in the distribution corresponds to a z-score of z = -1.00? Below the mean by 1 point Below the mean by a distance equal to 1 standard deviation Above the mean by a distance equal to 1 standard deviation Above the mean by 1 point
Below the mean by a distance equal to 1 standard deviation
Explanation: A z-score of -1.00 corresponds to a position in the distribution that is below the mean by 1 point.
question
For a sample with M = 50 and s = 12, what is the X value corresponding to z = -0.25? 46 47 54 53
47
Explanation: The X value corresponding to z = -0.25 is 47.
question
For a sample of n= 30 scores, X = 45 corresponds to z = 1.50 and X = 40 corresponds to z = +1.00. What are the values for the sample mean and standard deviation? M = 35 and s = 10 M = 35 and s = 15 M = 30 and s = 15 M = 30 and s = 10
M = 30 and s = 10
Explanation: The sample mean is 35 and the sample standard deviation is 10.
question
For a sample of n= 30 scores, X = 45 corresponds to z = 1.50 and X = 40 corresponds to z = +1.00. What are the values for the sample mean and standard deviation? +0.25 +0.75 +1.25 +1.50
1,5
Explanation: The sample mean is 30 and the sample standard deviation is 15.
question
A sample of n= 20 scores is transformed into z-scores. What is the value of SS, the sum of squared deviations, for the set of 20 z-scores? 0 20 19 Cannot be determined without more information
19
Explanation: The value of SS, the sum of squared deviations, for the set of 20 z-scores, is 0.
question
If an entire population with μ= 60 and σ = 8 is transformed into z-scores, then the distribution of z-scores will have a mean of ___ and a standard deviation of ___. 0; 8 60; 1 0; 1 60; 8 (unchanged)