Chapter Questions
Which of the following is a measure of variation?a. Rangeb. Meanc. Moded. Frequencye. Median
Which statistical measure of central tendency is most affected by extreme scores?a. Meanb. Medianc. Moded. Skewe. Correlation
A researcher calculates statistical significance for her study and finds a 5 percent chance that results are due to chance. Which of the following is an accurate interpretation of this finding?a. This is well beyond the range of statistical significance.b. This is the minimum result typically considered statistically significant.c. This is not statistically significant.d. There is no way to determine statistical significance without replication of the study.e. Chance or coincidence is unrelated to statisticalsignificance.
Descriptive statistics ______________ while inferential statistics ________________a. indicate the significance of the data; summarize the datab. describe data from experiments; describe data from surveys and case studiesc. are measures of central tendency; are measures of varianced. determine if data can be generalized to other populations; summarize datae. summarize data; determine if data can be generalized to other populations
In a normal distribution, what percentage of the scores in the distribution falls within one standard deviation on either side of the mean?a. 34 percentb. 40 percentc. 50 percentd. 68 percente. 95 percent