Ch 5 Review worksheet

1A  2B  3A  4D  5B  6C  7D  8C  9C  10D
11) 68.3 %
12) 66.9%
13) -1. Mean is 1 less than the median.
14) 95
15) 3/2 = 1.5
16) 46
17) 1.44
18) 57.648< µ < 62.352
19) 226
20a) $1182.10 < µ < $1223.90
20b) increase sample size n, or decrease confidence level
21) 97.7%
22) No, it doesn’t follow a bell-shaped curve, but more of a lop-sided curve.
23a) µ = 79.4, σ = 8.4
b) 24
c) 66.7%
d) 36 (all scores)
e) 100%

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