25. A verage Wind Speeds A sample of 40 large cities was selected, and the average of the wind speeds was com- puted for each city over one year. Construct a frequency distribution, using 7 classes. 12.2 10.5 9.5 10.2 6.2 8.9 8.7 10.5 10.2 10.7 9.0 8.9 12.2 7.1 11.0 8.7 8.4 8.8 7.1 10.1 11.2 9.1 8.2 7.9 8.7 10.4 7.7 12.3 10.7 7.7 7.8 11.8 10.5 7.9 8.3 8.7 9.6 9.6 8.6 10.3

DO esc 2 1 Q Nine cyclists were each asked the distance in miles they biked last week. Their responses are given below. Complete the grouped frequency distribution for the data. In the distribution, the frequency of a class is the number of distances in that class. (Note that we are using a class width of 6.) A Y Penguin Portal | YSU O DESCRIPTIVE STATISTICS Constructing a frequency distribution for grouped data Distance in miles F1 18 18 12 O 11 19 9 Explanation 9.6 @ 2 15 F2 W S Check Distance in miles # 3 2 to 7 E 8 to 13 14 to 19 80 F3 D $ 4 Q F4 R Frequency U 0 U F % 5 LO 9 F5 T G X www-awu.aleks.com 6 F6 Content MacBook Air Y Ś & 7 H F7 © 2022 McGraw Hill LLC. All Rights Reserved. Te U * 8 J DII F8 9 C K F9 0

Pupils Per Teacher The average number of pupils per teacher in certain states is shown. 10 13 16 20 24 25 18 18 10 17 15 16 12 17 14 21 15 17 18 11 17 13 22 15 22 14 18 25 15 20 16 13 20 17 17 13 20 14 16 14 20 15 18 14 20 15 18 20 18 Send data to Excel Part 1 of 6 What is the class width for a frequency distribution with 6 classes? The class width is 2.5 Correct Answer: The class width is

6

Identify the class width, class midpoints, and class boundaries for the given frequency distribution.             Brain Volume (cm3)                Frequency                   1,000 - 1,089                                       6             1,090 - 1,179                                       7             1,180 - 1,269                                       3             1,270 - 1,359                                       2             1,360 - 1,449                                       1             1,450 - 1,539                                       1             Class width _________             Class midpoints _____, _____, _____, _____, _____, _____             Class boundaries _____, _____, _____, _____, _____, _____

Pupils Per Teacher The average number of pupils per teacher in certain states is shown. 24 14 18 23 27 23 13 17 14 9 16 17 19 14 22 21 19 16 19 18 14 21 23 19 13 18 19 22 14 17 18 23 20 16 21 18 25 21 16 17 11 21 26 16 23 24 15 Send data to Excel Part 1 of 6 What is the class width for a frequency distribution with 5 classes? The class width is 4. IS Part: 1/6 Part 2 of 6 Find the class limits. The first lower dass limit is 9. Class limits 9-