Quiz 2 Questions

There is an infinite area under the normal curve, since it extends forever in both directions

False

About 95% of people score between -1 and +1 standard deviations about the mean on IQ tests

False

The mean of a set of z scores must always equal 1

False

The median is part of the formula for a z score, serving as a reference point for each deviation.

False

The shape of the distribution of data can change when the raw scores are converted to z scores

False

You can only calculate z scores on data that are normally distributed

False

The areas under the curve listed in Table A apply to any distribution, regardless of shape

Fasle

A raw score that is below the mean will have a negative z score

True

A z score tells how many standard deviations a raw score is above or below the mean of a distribution

True

The normal curve is relatively common in psychology

True