4. There are many ways to measure the reading ability of children. Research designed to improve reading performance is dependent on good measures of the outcome. One frequently used test is the DRP, the Degree of Reading Power. A researcher suspects that the mean scoreu of all third-graders in Henrico County Schools is different from the national mean, which is 32. To test her suspicion, she administers the DRP to an SRS of 44 Henrico County third-grade students. The distribution of scores is summarized in the Minitab output below. Mean Stdev SeMean Min Q1 Median Q3 Маx DRP 35.09 11.19 1.69 14.00 26.00 35.00 44.00 54.00 Construct and interpret a 98% confidence interval to estimate the mean DRP score in Henrico County Schools.

Cris Turlock owns and manages a small business in San Francisco, California. The business provides breakfast and brunch food, via carts parked along sidewalks, to people in the business district of the city. Being an experienced businessperson, Cris provides incentives for the salespeople operating the food carts. This year, she plans to offer monetary bonuses to her salespeople based on their individual mean daily sales. Her first task is to see if there is a significant difference in the mean daily sales among the different salespeople. She chooses a "sample" of days for each salesperson and records the sales for each day. She then runs a one-way, independent-samples ANOVA test to determine whether or not she can conclude that at least one salesperson's performances is significantly different from the others. (Otherwise, she'll split the bonuses evenly among all the salespeople.) In her ANOVA, the "groups" are the different salespeople, and the variable of interest is the daily sales…

The correlation between mean 2015 Mathematics SAT scores and mean 2015 Writing SAT scores for all 50 states and the District of Columbia is 0.983. Would you expect the correlation between the mean state SAT scores for these two tests to be lower, about the same, or higher than the correlation between the scores of individuals on these two tests? Explain your answer.

Answer the questions below. (a) The following number of people attended the last 9 screenings of a movie: 196, 200, 201, 202, 203, 206, 207, 208, 211. Which measure should be used to summarize the data? Mean Median Mode (b) On a test, each student is given a grade of A, B, C, D, or F. Which measure tells the grade given most often? Mean Median Mode (c) In the past 9 days, Greg has received the following numbers of email advertisements per da 41, 42, 43, 44, 47, 48, 49, 52, 87. Which measure should be used to summarize the data? Mean Median Mode