# Question: What do measures of variability communicate about a The size of

What do measures of variability communicate about

(a) The size of differences among the scores in a distribution?

(b) How consistently the participants behaved?

(c) The size of our “average error” when we predict that participants obtained the mean?

(a) The size of differences among the scores in a distribution?

(b) How consistently the participants behaved?

(c) The size of our “average error” when we predict that participants obtained the mean?

## Relevant Questions

Say that you conducted the experiment in question 19 on the entire population. (a) Summarize the relationship that you’d expect to observe. (b) How consistently do you expect participants to behave in each condition? For each of the following, identify the conditions of the independent variable, the dependent variable, their scales of measurement, which measure of central tendency and variability to compute and which scores you would use ...(a) What does a z-score indicate? (b) Why are z-scores important? In a normal distribution, what proportion of all scores would fall into each of the following areas? (a) Between the mean and z = +1.89; (b) Below z = -2.30; (c) Between z = -1.25 and z = +2.75; (d) Above z = +1.96 and below ...What does a relatively small standard deviation indicate about the scores in a sample? (b) What does this indicate about how accurately the mean summarizes the scores. (c) What will this do to the z-score for someone who is ...Post your question