Chapter 2, Problem 2.15CYS

To determine

The mean of the given data.

Answer to Problem 2.15CYS

The correct option is (b) 167.48.

Explanation of Solution

Given info:

The times in seconds to swim 200 metres at 90% of race pace when breathing every second stroke in front crawl swimming are given:

times
151.6
165.1
159.2
163.5
174.8
173.2
177.6
174.3
164.1
171.4

Reason for correct answer:

Step-by-step procedure to obtain the mean of the given data using the MINITAB software is.

• Enter the name of variable times> Enter the given set of observations.
• Go to Stat> choose Basic statistics>choose Display descriptive statistics.
• Choose times > choose select >choose statistics> select mean.
• Choose OK.
• Choose OK.

Output using the MINITAB software is given below:

From the MINITAB output, the mean of the given data is 167.48.

Reason for incorrect answer:

Option a.: Mean calculated using MINITAB software is not 165.10.

Option c.: Mean calculated using MINITAB software is not 168.25.

Conclusion:

The mean of the given data is 167.48.