1 / 32

Lesson 5-8 Pages 238-242

Lesson 5-8 Pages 238-242. Measures of Central Tendency. Lesson Check 5-7. What you will learn!. How to find the mean, median, and mode as measures of central tendency. How to use the mean, median, and mode. Vocabulary. What you really need to know!.

jett
Download Presentation

Lesson 5-8 Pages 238-242

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Lesson 5-8 Pages 238-242 Measures of Central Tendency Lesson Check 5-7

  2. What you will learn! • How to find the mean, median, and mode as measures of central tendency. • How to use the mean, median, and mode.

  3. Vocabulary

  4. What you really need to know! When working with numerical data, it is often helpful to use one or more numbers to represent the whole set. These numbers are called measures of central tendency.

  5. What you really need to know!

  6. Example 1: The revenue of the 10 highest grossing movies as of June 2000 are given in the table. Find the mean, median, and mode of the revenues.

  7. Example 1: Mean $379.8 million 3,798 3,798 ÷ 10 379.8

  8. Example 1: Median $343.5 million 330 + 357 = 687 687 ÷ 2 = 343.5

  9. Example 1: Mode No Mode This is no number or numbers that appear more than any other number. Therefore there is no mode.

  10. Example 2: The line plot on the next screen shows the number of gold medals earned by each country that participated in the 1998 Winter Olympic Games in Nagano, Japan. Find the Mean, median, and mode for the gold medals won.

  11. Example 2: There are 24 numbers in this set of data! 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

  12. Example 2: 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 0 + 1 + 1 + 2 + 2 + 2 + 2 +3 + 3 + 5 + 5 + 6 + 6 + 9 + 10 + 12= 69 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

  13. Example 2: 69 ÷ 24 = 2.875 mean 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

  14. Example 2: The numbers are all ready in order. Since there are 24 numbers, the median would be 12 from the top and bottom of the line plot. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 The median is 2.

  15. Example 2: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 The mode is 0

  16. Example 3: The quiz scores for a math class are 8, 7, 6, 10, 8, 8, 9, 8, 7, 9, 8, 0, and 10. Identify an extreme value and describe how it affects the mean.

  17. Example 3: 0 is an extreme value. Mean with 0 is 7.5 Mean without 0 is 8.2 The 0 lowers the mean by 0.7 points.

  18. Example 4: The table shows the monthly salaries of the employees at two bookstores. Find the mean, median, and mode for each set of data. Based on the averages, which bookstore pays its employees better?

  19. Median Median Mode

  20. The Reading Place pays its employees better.

  21. Example 5: Jenny’s bowling average is 146. Today she bowled 138, 140, and 145. What does she need to score on her fourth game to maintain her average?

  22. Example 5: 146 • 4 = 584 138 + 140 + 145 = 423 584 – 423 = 161 Jenny needs to score at least 161 on her fourth game.

  23. Page 241 Guided Practice #’s 3-9

  24. Read: Pages 238-240 with someone at home and study examples!

  25. Homework: Pages 241-242 #’s 10-16 all #’s 21-35 Lesson Check 5-8

  26. Page 735 Lesson 5-8

  27. Lesson Check 5-8

More Related