The USGolf Association Provides a Number of Services for Its Members

question 19

Multiple Choice

The U.S.Golf Association provides a number of services for its members.One of these is the evaluation of golf equipment to make sure that the equipment satisfies the rules of golf.For example,they regularly test the golf balls made by the various companies that sell balls in the United States.Recently,they undertook a study of two brands of golf balls with the objective to see whether there is a difference in the mean distance that the two golf ball brands will fly off the tee.To conduct the test,the U.S.G.A.uses a robot named "Iron Byron," which swings the club at the same speed and with the same swing pattern each time it is used.The following data reflect sample data for a random sample of balls of each brand. Given this information,what is the test statistic for testing whether the two population variances are equal?

• A)Approximately F = 1.145
• B)t = 1.96
• C)t = -4.04
• D)None of the above

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Definitions:

Statistically Significant

An observation or effect sufficiently large or important to be unlikely to have occurred by chance, as per a predefined threshold in hypothesis testing.

Confidence Interval

An aggregation of values, hailing from sample statistics, anticipated to envelop the value of an unseen population parameter.

Sample Mean

The average value of a sample set, calculated by summing all observations and dividing by the number of observations.

Symmetric

A shape or distribution is considered symmetric if it looks the same to the left and right of the center point.