PS 05 WORKSHEET

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```					Name                                                      WORKSHEET
Lesson 05 Histograms

1. A marketing consultant observed 30 consecutive shoppers at a supermarket. The
consultant asked each shopper how much they spent. Here are the replies (from smallest
to largest).

3.11 8.88 9.26 10.81 12.69 13.78 15.23 15.62 17.00 17.39
18.36 18.43 19.27 19.50 19.54 20.16 20.59 22.22 23.04 24.47
24.58 25.13 26.24 26.26 27.65 28.06 28.08 28.38 32.03 34.98

a. Make a histogram.                        b. Write 3 sentences describing the graph
Label the axes and the graph

2. Here is a sample of IQ scores from 60 randomly chosen fifth-grade students.

145    139    126     122      125   130    96     110    118     118
101    142    134     124      112   109    134    113    81      113
123    94     100     136      109   131    117    110    127     124
106    124    115     133      116   102    127    117    109     137
117    90     103     114      139   101    122    105    97      89
102    108    110     128      114   112    114    102    82      101

a. Make a histogram.                        b. Write 3 sentences describing the graph
Label the axes and the graph

c. If you know that IQ scores have a mean of 100 and a standard deviation of 15, how
might you change your scale to better represent the data?
3. IN 1995 the Council of Europe conducted a survey investigating the percentages of 9th
graders who had used marijuana. Here are the results for 20 Western European
Countries. Create a histogram and describe the distribution.

10%    19%     19%    6%       17%    31%    40%    23%    5%      6%
12%    7%      21%    53%      2%     15%    10%    6%     37%     27%

a. Make a histogram.                         b. Write 3 sentences describing the graph
Label the axes and the graph

4. Two researchers measured the pH of water collected from rain and snow over a 6-
month period in Allegheny County, Pennsylvania. Describe their data with a graph and a
few sentences.

4.57   5.62    4.12   5.29     4.64   4.31   4.30   4.39   4.45
5.67   4.39    4.52   4.23     4.23   4.4    5.78   4.73   4.56
5.08   4.41    4.12   5.51     4.82   4.63   4.29   4.60

a. Make a histogram.                         b. Write 3 sentences describing the graph
Label the axes and the graph

Complete the following book problems

p. 243 #4.36
p. 244 #4.38
p. 245 #4.39
p. 245 #4.40

```
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