+

Review for Quarter 4 Test 2

LIII. Central TendencyLIV. Graphs

+ Stem | Leaves 0 | 2 2 7 8 1 | 0 2 5 5 2 | 5 5 3 | 6 4 | 0

Find each.range:mean:median:mode:lower extreme:upper extreme:lower quartile:upper quartile:

Answers: range: 38; median: 13.5; mode: 2, 15, 25;

mean: 16.4; lower extreme: 2; upper extreme: 40

lower quartile: 7; upper quartile: 25

+ Fill in the frequency and the cumulative frequency.

New Book Club Members

Members ||| |||| || |||| | |

Frequency

Cumulative

Frequency

Week 1 2 3 4 5

Answers: Frequency: 3, 5, 2, 6, 1Cumulative Frequency: 3, 8, 10, 16, 17

+Answer the following questions based on the box-and-whisker plot.

Answers:

+Tim wants to have an average of 85. His scores on 3 tests were: 81, 80, 85. What must his next test score be to meet his goal? Solve algebraically.

Answer: 81 + 80 + 85 + x = 85

4

(4) 246 + x = 85 (4)

4

246 + x = 340

- 246 -246

x = 94