Author: Anonymous

A researcher surveys a sample of n = 200 college students and asks each person to identify their favorite movie. Which kind of graph should be used to present these results?

What is the percentile rank for a score of 4 in the frequency distribution table below? X      f ​ 6      4 ​ 5      5 ​ 4      1 ​ 3      3 ​ 2      6 ​ 1      1 ​

A set of 5 scores has SS = 20. If the scores are from a sample, the sample variance is ____. If the scores comprise a population, the population variance is ____.

Which of the following would be an example of a discrete variable?

On an exam with a mean of µ = 70, a person scores X = 60. Which of the following values for the standard deviation would position this person highest within the class?

A researcher uses an anonymous survey to investigate the study habits of American college students. Based on the set of 56 surveys that were completed and returned, the researcher finds that these students spend an average of 4.1 hours each week working on course material outside of class. For this study, the average of 4.1 hours is an example of a ____.​

Exhibit 3-4The following is the frequency distribution for the speeds of a sample of automobiles traveling on an interstate highway.   Speed (mph) Frequency   50−54   2   55−59   4   60−64   5   65−69 10   70−74   9   75−79   5     35 ​ ​   Refer to Exhibit 3-4. The variance is _____.

Consider the two frequency distribution tables below that each pertain to distinct samples. What is the weighted average of these samples when combined? Sample A X      f ​ 6      2 ​ 5      0 ​ 4      1 ​ 3      2 ​ 2      4 ​ 1      1 ​ Sample B X      f ​ 5      2 ​ 4      5 ​ 3      1 ​ 2      0 ​ 1      5 ​

What is the median for the population of scores presented in the frequency distribution table below? X      f ​ 5      7 ​ 4      2 ​ 3      1 ​ 2      1 ​ 1      3 ​

Which of the following would be an example of a continuous variable?