Chapter 3 Data Description Section 3-2 Measures of Central Tendency.

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Presentation transcript:

Chapter 3 Data Description Section 3-2 Measures of Central Tendency

Section 3-2 Exercise #3

MD: 1, 2, 3, 3, 7, 11, 18, 30, 61 MD: 7

Section 3-2 Exercise #5 Find (a) the mean, (b) the median, (c) the mode, and (d) the midrange.

(c) No data are repeated. No mode. (d) Arrange data in increasing order. (b) Arrange data in increasing order: 75 88 117 136 189 229 239 372 465 574 663 1202 median

It seems that the average number of identity thefts is higher than 300.

Section 3-2 Exercise #17 5 107.5-118.5 14 96.5-107.5 18 85.5-96.5 25 74.5-85.5 12 63.5-74.5 6 52.5-63.5 Frequency Class Boundaries

Boundaries 52.5 – 63.5 348 6 58 63.5 – 74.5 828 12 69 74.5 – 85.5 2000 25 80 85.5 – 96.5 1638 18 91 96.5 – 107.5 1428 14 102 107.5 – 118.5 565 5 113 6807 80

modal class: 74.5 – 85.5