1. Data Analysis Review Are you ready for the test !!!!!! 6 th Grade Graham Park Middle School April 2013 Which one should I use !!!

2. Rules for review Use a white board (or piece of paper ) to work out the problems and display your answer Show work when required Circle your answer Each slide will have one question followed by the answer Let’s begin!!

3. Question 1 What is the mean of the following data set? 90, 85, 77, 52 Obj 6.15

4. Answer 1 What is the mean of the following data set? 52, 77, 85, 90 = 304 4 Mean = 76 Obj 6.10

5. Question 2 What is the median of the following data set? 90, 85, 77, 52 Obj 6.15

6. Answer 2 What is the median of the following data set? Obj 6.15 52, 77, 85, 90 77 + 85 162/2 = 81 Is the Median

7. Question 3 What is the mode of the following data set? 66, 75, 43, 77, 85, 52, 75 Obj 6.9

8. Answer 3 What is the mode of the following data set? 43, 66, 52, 75, 75, 77, 85 The mode is 75 Obj 6.15

9. Question 4 What is the range of the following data set? 66, 75, 43, 77, 85, 52, 75 Obj 6.15

10. Answer 4 What is the range of the following data set? 43, 66, 52, 75, 75, 77, 85 85 - 43 = 42 Range = 42 Obj 6.15

11. Question 5 What is the best measure to use - Mean, Median or the Mode? You take a survey of the shoe sizes in class. Obj 6.15

12. Answer 5 What is the best measure to use - Mean, Median or the Mode? You take a survey of the shoe sizes in class. - A collection of similar data - Mode Obj 6.15

13. Question 6 What is the best measure to use - Mean, Median or the Mode? The President of US has a salary of $400,000. The members of Congress have a salary that range from $174,000 to $193,000 for the Majority and Minority leaders. Obj 6.15

14. Answer 6 What is the best measure to use - Mean, Median or the Mode? The President of US has a salary of $400,000. The members of Congress have a salary that range from $174,000 to $193,000 for the Majority and Minority leaders. Median is the best measure of data since the President’s salary is an outlier compared to the other salaries. Obj 6.15

15. Question 7 What is the best measure to use - Mean, Median or the Mode? You take a survey of a 6 th, 7 th and 8 th class to determine the average age. Obj 6.15

16. Question 7 What is the best measure to use - Mean, Median or the Mode? You take a survey of a 6 th, 7 th and 8 th class to determine the average age. Mean works best for this set of data with no very high or very low numbers. Obj 6.15

17. Question 8 In question 1, we determined the mean of the following data set? 52, 77, 85, 90 - Mean = 76 This student wants to raise their average to 80%. What is minimum score they need to achieve on the next test? Obj 6.15

18. Answer 8 52, 77, 85, 90 - Mean = 76 5 tests x 80 = 400 total points 4 tests already completed = 304 points Next test must equal 96% to raise the average from 76% to 80% Obj 6.15

19. Question 9 Using the information from question 8, what is the median? Obj 6.15

20. Answer 9 Using the information from question 8, what is the median? 52, 77, 85, 90, 96 85 is the new median Obj 6.15

21. Question 10 I have completed 4 tests; however, I only remember the scores for 3 of the test - 77, 52, 85. I remember that the median scores of my tests was 80. What is the score of the missing test score? Obj 6.15

22. Question 10 I have completed 4 tests; however, I only remember the scores for 3 of the test - 52, 77, 85. I remember that the median scores of my tests was 80. What is the score of the missing test score? 52, 77, x, 85 Obj 6.15 80 Is the Median 80 * 2 = 160 -77 83 83 is the missing test score

23. Question 11 Using the chart about, what percentage of doubles are included in the yearly baseball batting summary? Obj 6.14

24. Answer 11 Using the chart about, What percentage of doubles are included in the yearly baseball batting summary? Obj 6.14 80 doubles 200 total = 2525 40% =

25. Question 12 What category has the greatest use of daily water usage? Obj 6.14

26. Question 12 Obj 6.14 What category has the greatest use of daily water usage? The washing machine has the greatest use of daily water usage

27. Question 13 What category has the least use of daily water usage? Obj 6.14

28. Question 13 Obj 6.14 What category has the least use of daily water usage? The dishwasher has the least use of daily water usage

29. Question 14 What percentage of campers enjoyed canoeing as their favorite activity? Obj 6.14

30. Answer 14 Percentage of campers who enjoyed canoeing was 25% Obj 6.14

31. Question 15 If the total # of campers was 128 and % canoeing = 25% what was the # who enjoyed canoeing as their favorite activity? Obj 6.14

32. Answer 15 128 * 25% or 128 *.25 = 32 32 (of the 128) actual enjoyed canoeing as their favorite activity Obj 6.14