Every year, 50,000 runners compete in the Peachtree Road Race. They run 10 kilom

Question

Every year, 50,000 runners compete in the Peachtree Road Race. They run 10 kilometers (a little over 6 miles). The average finishing time is 52 minutes, with a standard deviation of 9 minutes. Fred and Wilma completed the race in 61 and 48 minutes, respectively. Barney and Betty had finishing times with z-scores of -0.3 and 0.7, respectively. (1 pt)

List the runners in order, starting with the fastest runner and ending with the slowest runner.

Wilma, Betty, Fred, Barney

Barney, Wilma, Fred, Betty

Wilma, Barney, Betty, Fred

Barney, Fred, Betty, Wilma

None of the above

Explanation / Answer

The more negative z score is, earlier the finish time.

z score for Fred = (61 - 52)/9 = 1

z score for Wilma = (48 - 52)/9 = -0.4

Hence,

The correct runners order will be:

Wilma, Barney, Betty, Fred

Option C is correct.

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