PSYC 354 Quiz: Standard Deviation and z-Scores (Liberty university) FALL 2025

Question 1 3 / 3 pts Which position in a distribution corresponds to a z-score of z = –1.00? below the mean by 1 point below the mean by 1 standard deviation above the mean by 1 point above the mean by 1 standard deviation  Question 2 3 / 3 pts Individuals noticeably different from the population following a treatment will tend to have extreme z-scores. True False  Question 3 3 / 3 pts Which z-score value represents the location farthest from the mean? z = +0.50 z = -0.50 z = –1.00 z = –2.00 Incorrect  Question 4 0 / 3 pts The distribution of z-scores corresponding with a population of scores always has a variance of _____. σ2 = 1. σ2 = 2. σ2 = 0. This cannot be determined based on the information provided.  Question 5 3 / 3 pts For a distribution of scores, the location identified by z = +1.00 and the location identified by z = –1.00 are the same distance from the mean. True False  Question 6 3 / 3 pts A researcher may decide to transform original scores into a distribution with a pre-determined mean and standard deviation other than the z-score distribution because the z-score distribution _. often has a standard deviation and mean that is too small. does not allow for comparisons between otherwise different distributions. often contains decimals and negative values. is not standardized.