68% of statistics 95% of statistics 99.7% of statistics A Mean Mean 1 st. 2 st. dev below 2 st dev above 3 st. dev below 3 st dev above dev below above A company has a policy of retiring company cars; this policy looks at number of miles driven, purpose of trips, style of car and other features. The distribution of the number of months in service for the fleet of cars is bell-shaped and has a mean of 56 months and a standard deviation of 9 months. Using the empirical rule, what is the approximate percentage of cars that remain in service between 38 and 74 months? Do not enter the percent symbol. ans = % Mean 4 1 st. dev

the table below shows the number of books the Jefferson Middle school students readeach month for nine months. Month Sept. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May Number of Books 293 280 266 280 289 279 275 296 271 If the students read only 101 books for the month of June, which measure of central tendency will have the greatest change?A. The mean will have the greatest change.B. The median will have the greatest change.C. All measures will have an equal change.D. The mode will have the greatest change.

A researcher is interested in finding the mean and median lengths of all walleye in a lake. A Sample of 300 walleye was caught and their lengths were recorded. The sample mean and median lengths were found to be 28 inches and 33 inches.   a. What is the experimental unit in this experiment?   b. What are the population and sample in this experiment?   c. What are the parameters considered in this experiment?   d. What are the statistics in this experiment?

3. The data in the table shows the mileage that students commute to school. B. Find the weighted mean. Miles Midpoint Frequency 10 - 14 12 8 15 - 19 17 C. Draw a histogram for the data. 20 - 24 22 9 25 - 29 27 21 30 - 34 32 7 A. How many students are in the class?

The table below shows the number of books the Jefferson Middle school students readeach month for nine months. If the students read only 101 books for the month of June, which measure of central tendency will have the greatest change?A. All measures will have an equal change.B. The median will have the greatest change.C. The mean will have the greatest change.D. The mode will have the greatest change.

find population variance for given data  15,85,96,75,46,35,21,56,54,47

The data set below represents the total number of touchdowns a quarterback threw each season for 10 seasons of play. 29, 5, 26, 20, 23, 18, 17, 21, 28, 20 Order the values:5, 17, 18, 20, 20, 21, 23, 26, 28, 29 Determine the median: =  = 20.5 Calculate the measures of variability for the data set. The range is  touchdowns. The interquartile range is  touchdowns.

Help. a. About what percent of women in North Arerica are between 58 and 68.5 inches tall? b. About what percent of women in North America are less than 65 inches tall? c. In what range do the middle 99.7% of women's height lie? d. About what percent of women in North America are at least 61.5 inches tal?

In a scatter plot, each A.individual is represented by two data points B. group mean is represented by two data points C.group mean is represented by a single point D.individual is represented by a single point Reset Selection 7,821 MAR étv AA w FIL 吕口。 00 F4 F6 F7 F8 F9 F10 F2 F3 F5 % & * 4 5 6 7 8 E R

Find a set of 5 items in a data set that have a range of 9, a mean of 1, a median of 12, and a mode of 15