Normal Distribution and Z-Scores

The z score provides

• Information about how many standard deviations the score is from the mean

• The highest score

• The lowest score

• The mode

A positive standardized score represents

• An observed value at the mean

• An observed value above the mean

• One standard deviation

• Two standard deviations

Measurements in a bell-shaped curve

• Are evenly divided throughout the curve

• Are mostly positive

• Are clustered around the mean

• Are mostly negative

A z score

• Is a standardized score for an observed value

• Is a raw score

• Is always the mean

• Is always the median

The area on the z table associated with one standard deviation above the mean is

• .3413

• .6826

• .0000

• .9515

A negative z score is located

• Below the mean

• At the mean

• Above the mean

A positive z score is located

• At the mean

• Above the mean

• Below the mean

Find the z-score for 75 given a mean of 60 and a standard deviation of 6.

• -2.5

• 2.5

• -1.15

• 1.15