Chapter PI, Problem 36RE

(a)

To determine

To explain what are the W’s for these data.

Explanation of Solution

It is given in the question that the bicycle helmet safety institute website includes a report on the number of bicycle fatalities in the U.S. the data per year is also given. Thus, the W’s for these data will be as:

Who: Bicycle helmet safety institute.

What: Bicycle fatalities per year.

Where: United States.

When: $1994-2003$ .

Why: Report/track bicycle fatalities.

How: Reported accidents to the agency.

(b)

To determine

To display the data in a stem-and-leaf display.

Explanation of Solution

It is given in the question that the bicycle helmet safety institute website includes a report on the number of bicycle fatalities in the U.S. the data per year is also given. Thus, these data in the stem and leaf display is as:

Frequency	Stem	Leaf
3	6	1 6 8
5	7	2 5 5 6 9
2	8	1 2
10

(c)

To determine

To display the data in a time plot.

Explanation of Solution

It is given in the question that the bicycle helmet safety institute website includes a report on the number of bicycle fatalities in the U.S. the data per year is also given. Thus, these data in the time plot display is as:

(d)

To determine

To find out what is apparent in the stem and leaf display that is hard to see in the stem and leaf display.

Explanation of Solution

It is given in the question that the bicycle helmet safety institute website includes a report on the number of bicycle fatalities in the U.S. the data per year is also given. Thus, the apparent in the stem and leaf display that is hard to see in the stem and leaf display is that more than half of the years had fatalities in a rage of $750-830$ .

(e)

To determine

To find out what is apparent in the time plot that is hard to see in the stem and leaf display.

Explanation of Solution

It is given in the question that the bicycle helmet safety institute website includes a report on the number of bicycle fatalities in the U.S. the data per year is also given. Thus, the apparent in the time plot that is hard to see in the stem and leaf display is that as time goes on the amount of bicycle fatalities decreases.

(f)

To determine

To write a few sentences about bicycle fatalities in the U.S.

Explanation of Solution

It is given in the question that the bicycle helmet safety institute website includes a report on the number of bicycle fatalities in the U.S. the data per year is also given. Thus, in the ten year from $1994-2003$ most of the fatalities ranged from $750\text{ to 830}$ . As time went on the amount of deaths decreased.