A recent study of 50 U.S. chess players details such things as the number of years the players have been active and the chess ratings of the players. (A chess rating is a number, with a higher number indicating greater expertise.) The chess rating data for the sample of 50 players are summarized in the following histogram. Frequency 154 10- 5- 300 15 700 1100 1500 Chess rating Based on the histogram, draw the ogive (the cumulative relative frequency polygon) for the sample data. Cumulative relative frequency 7 1900 2300 2700

for the dataset c(1,2,2,2,4,5,6,6,7,8,9,9), what is the 75% or .75 quantile?

The following frequency histogram presents the final grades of a random sample of  100 college students. What is the class width?

In the data set below, the frequency of is 5, 7, 1, 12, 17, 5, 1, 7, 10, 5 5 3 --- 12 15 1 3 10

The following data were collected in a survey of 8th graders and summarize their cell phone status. What proportion of the 8th graders have cell phones?                                              No cell phone     Conventional cell phone     Smartphone                 Boys                            50                              65                                  33               Girls                             31                              76                                  27

A data set is summarized in the frequency table below. The data set contains a total of 30 data values. What is the missing frequency?   Value Frequency 1 5 2 3 3 4 4 6 5 □ 6 2 7 3 8 4

The highway speeds of 100 cars are summarized in the frequency distribution below. Find the estimated mean speed. Speed (mph) 30-39 40-49 50-59 60-69 70-79 Cars 3. 16 50 18 13 O A. 59.5 mph O B. 62.4 mph O C. 22.8 mph O D. 56.7 mph

Find the (a) mean, (b) median, (c) mode, and (d) midrange for the data and then (e) answer the given question. Listed below are the jersey numbers of 11 players randomly selected from the roster of a championship sports team. What do the results tell us? 15 26 89 80 37 83 73 72 32 78 70 D a. Find the mean. The mean is 59.5. (Type an integer or a decimal rounded to one decimal place as needed.) b. Find the median. The median is 72. (Type an integer or a decimal rounded to one decimal place as needed.) c. Find the mode. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. The mode(s) is (are) (Type an integer or a decimal. Do not round. Use a comma to separate answers as needed.) B. There is no mode. d. Find the midrange. The midrange is 52. (Type an integer or a decimal rounded to one decimal place as needed.) e. What do the results tell us? OA. The midrange gives the average (or typical) jersey number, while the mean and median give two…

A group of students were surveyed about the number of siblings they have. Their responses are summarized in the frequency table below. How many students responded to the survey? Number of Siblings Frequency 0 6 1 8 2 5 3 3 4 1 5 or more 3

Determine what the key terms refer to in the following study. We want to know the average (mean) amount of money first year college students spend at ABC College on school supplies that do not include books. We randomly surveyed 100 first year students at the college. Three of those students spent $150, $200, and $225, respectively.