PSY 213 - Exam 1 Quiz 5

For any distribution, what is the z-score corresponding to the mean? (0; 1; N; It cannot be determined from the information given.)

0

For a population with a standard deviation of s = 6, what is the z-score corresponding to a score that is 12 points above the mean? (z = 1; z = 2; z = 6; z = 12)

2

On an exam with m = 52, you have a score of X = 56. Which value for the standard deviation would give you the highest position in the class distribution? (std dev = 2; std dev = 4; std dev = 8; It cannot be determined from the information given.)

2

What position in the distribution corresponds to a z-score of z = +2.00? (Above the mean by 2 points; Above the mean by a distance equal to 2 standard deviations; Below the mean by 2 points; Below the mean by a distance equal to 2 standard deviations)

Above the mean by a distance equal to 2 standard deviations

A score with a value less than or equal to the mean will have a z-score that is less than or equal to zero.

True

Any individual with a positive z-score has a score greater than the mean.

True

If two individuals in the same population have identical X scores, they also will have identical z-scores.

Ture

Under what circumstances is a score that is located 5 points above the mean a central value, relatively close to the mean? (When the population mean is much less than 5; When the population mean is much greater than 5; When the population standard deviation is much less than 5; When the population standard deviation is much greater than 5)

When the population standard deviation is much greater than 5

A population distribution has a standard deviation = 6. What position in this distribution is identified by a z-score of z = +2.00? (two points above the mean; two points below the mean; twelve points above the mean; twelve points below the mean)

twelve points above the mean

Which of the following z-score values represents the location closest to the mean? (z = +0.50; z = +1.00; z = -1.00; z = -2.00)

z = +0.50