1. The following graph appeared in a local newspaper.

a) Which age group had the most accidents?

b) How could you improve the graph to make better comparisons between the numbers of accidents for

different age groups?

c) How would these improvements affect your answer to part a)?

d) Why can you not make any conclusions about the relationship between drivers' ages and their risk of

having an accident?

2

2. Here are the numbers of computers sold by an office supply store on the 50 business days before Christmas.

For these data: [T/I-4, A-6]

4 8 9 6 7

8 3 4 6 10

6 10 9 12 7

7 4 6 9 8

3 7 8 6 9

9 6 9 4 10

7 9 7 4 8

5 9 6 5 8

7 4 7 9 8

7 3 10 10 8

a) Choose a reasonable interval size and number of intervals.

b) make a frequency table

c)make a histogram.