1. Sections 2.1 and 2.2
Problems

2. Quiz 2.1 – 2.2 tomorrow
-May use 1 side of a 4 x 6 note card for the quiz

3. Percentage of Renters in 77 Cities

4. Percentage of Renters in 77 Cities
What are the cases?
What is the variable?

5. Percentage of Renters in 77 Cities
What are the cases?
the 77 cities
2. What is the variable?

6. Percentage of Renters in 77 Cities
What are the cases?
the 77 cities
2. What is the variable?
percentage of renters

7. Percentage of Renters in 77 Cities
3. What is the shape?

8. Percentage of Renters in 77 Cities
What is the shape?
skewed right

9. Percentage of Renters in 77 Cities
4. What is the center?

10. Percentage of Renters in 77 Cities

11. Percentage of Renters in 77 Cities48

12. Percentage of Renters in 77 Cities
To find the position of median, use:

13. Percentage of Renters in 77 Cities

14. Percentage of Renters in 77 Cities48

15. Percentage of Renters in 77 Cities
Q1 =
Q3 =

16. Percentage of Renters in 77 Cities
Q1 = 43
Q3 =

17. Percentage of Renters in 77 Cities
Q1 = 43
Q3 = 55

18. Page 55, E22

19. Page 55, E22

20. Page 55, E22
mean

21. Page 55, E22a
mean SD

22. Page 55, E22a
mean SD
Actual values: 518, 114

23. Page 55, E22b

24. Page 55, E22b
b. estimate 68% of the SAT I math scores are within one standard deviation of the mean

25. Page 55, E22c
For SAT I critical reading scores, the shape was similar, but the mean was 10 points lower and the standard deviation was 2 points smaller.
Actual values for math: 518, 114

26. Page 55, E22c
Actual values: 518, 114

27. Page 54, E20
Convert the histogram in Display 2.38 into a relative frequency histogram.

28. Page 54, E20

29. Page 52, P11
Make the right side for maximum longevity and use a split-stem method.

30. Page 52, P11

31. Page 52, P11
The values of average longevity are generally smaller and have a slight skewness toward the larger values.
The distribution of maximum longevity is more spread out and is more uniform in shape.

32. Page 54, E21

33. Page 54, E21a

34. Page 54, E21b

35. Page 54, E21c

36. Page 54, E21d

37. Page 54, E21e

38. Page 55, E23

39. Page 55, E23a
a. We should predict that domesticated mammals generally have greater longevity due to their relative safety and better care.

40. Page 55, E23b
Average Longevities

41. Page 55, E23c

42. Page 53, P13

43. Page 53, P13

44. Page 53, P13

45. Questions? Quiz 2.1 – 2.2 tomorrow
-May use 1 side of a 4 x 6 note card for the quiz