What Are the Ages of the

2015 Iditarod Mushers?

By: Carmen

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Histogram

11-20 21-30 31-40 41-50 51-60 61-70 71-800

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Box Plot

Summarize Data Set

Number of mushers: 79

Mean: The mean age of the mushers in the 2015 Iditarod Race is 42.5. First, I added all the ages together. My sum was 3,358. Then I divided by 79, which is the total number of mushers.

Median

Median: To find the median, order the mushers' ages from least to greatest, and find the number in the middle.

The median age of the mushers was 42.

Mode

Mode: The ages that occurred most often were 38, 39, 42, and 46. These ages each occurred 4 times.

Summary continued

Range: 56

The oldest musher was Jim Lanier, who was 74 years old.

The youngest musher was Benjamin Harper, who was 18 years old.

Interquartile Range

Quartile 1: 33

Quartile 3: 53

Interquartile Range: 20

Mean Absolute Deviation

1. Find the mean of all values 2. Find the distance of each value from that mean (subtract mean from each value, ignore minus sign)3. Then find the mean of those distances

M.A.D. =9.5

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