ANSWER TO FRAME 30.

Ordering both samples gives:

Sample A: 7, 17, 22, 23, 29, 34

Sample B: 7, 17, 22, 23, 29, 10,000

Since there are an even number of observations we find the mean of the middle two which gives:

Sample A: (22 + 23) /2 22.5

Sample B: (22 + 23) /2 - 22.5

Note that the median is not affected by extreme values as the mean was.

ANSWER TO FRAME 31.

Sample A: The value 22 occurs twice and all other values occur only once, so the mode is 22.

Sample B: Each value occurs the same number of times, once. The mode is the value or

values that occur most often in the data set.

Sample C: The values 7 and 22 both occur twice. Both are modes of this group of data.

Since two values occur twice, the data are bi-modal (two modes).

Notice there may be none, one, or more than one mode for a group of observations. There is,

however, only one mean or median for any group of data.

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