6. Find the mean of the following frequency distribution:

Limits Frequency

40-42 12

43-45 4

46-48 9

49-51 18

52-54 5

47____

56___

48____

51____

8. A distribution is skewed to the right (positive bias) if the mean and median are to the right of the mode.

True___ or False_____

9. Determine P62 for the following data: 77, 66, 55, 44, 82, 88

44___

66____

77____

62____

10. To construct a box plot you need the following values:

median, mean, mode, first quartile, third quartile____

first quartile, median, third quartile, range, standard deviation_____

first quartile, third quartile, mean, lower data, higher data______

first quartile, third quartile, median, lower data, higher data______

11. If the standard deviation of a sample is ten (10), then the variance is:

20_____

5.2_____

100____

3.16____

12. Find the standard deviation of the following data: 22, 23, 14, 28, 25

27.3___

5.22___

10.44___

2.73____

13. Determine the interquartile range of the following data: 148, 144, 113, 109, 90.

34___

45____

53____

35___

14. The empirical rule states that about three standard deviations from the mean are _______% of the data.

95____

99.9____

68_____

15. Determine the standard deviation for the following frequency distribution:

Limits Frequency

8-11 6

12-15 10

16-19 4

20-23 13

27.22____

22.27____

5.12____

4.72_____

16.Determine the median axis with the following data: 63, 78, 90, 93, 123

85.5____

78_____

93_____

171____