Communication

Which of the following statements best describes what it means when a researcher asserts that the level of significance is at the .05 level?

The measured associations of no greater than 5 out of 100 cases are due to sampling error.

What does it mean if a z-score for a given participant is 1.5?

The score for this participant is 1.5 standard deviations above the sample's mean.

When does a Type II error occur?

When the researcher accepts the null hypothesis, when the null hypothesis should be rejected.

When does a Type I error occur?

When the researcher rejects the null hypothesis, when the null hypothesis should be accepted.

Which of the following is a statistic of association?

correlation

Which of the following levels of measurement enable you to report all of the measures of central tendency and all of the measures of dispersion?

interval level

Which measure of central tendency is the mathematical average of a set of values?

the mean

Which measure of central tendency represents the "middle value"?

the median

Which measure of central tendency is the most frequently reported value in a data set?

the mode

at measure of central tendency should you use when your data is measured at the nominal level?

the mode