Golf-course designers have become concerned that old courses are becoming obsole

Question

Golf-course designers have become concerned that old courses are becoming obsolete since new technology has given golfers the ability to hit the ball so far. Designers, therefore, have proposed that new golf courses need to be built expecting that the average golfer can hit the ball more than 235 yards on average. Suppose a random sample of 138 golfers be chosen so that their mean driving distance is 232 yards. The population standard deviation is 45.5. Use a 5% significance level.

Calculate the followings for a hypothesis test where H0:?=235 and H1:?<235 :

(a)   The test statistic is    
(b)   The P-Value is  

The final conclustion is

A. There is sufficient evidence to warrant rejection of the claim that the mean driving distance is equal to 235
B. There is not sufficient evidence to warrant rejection of the claim that the mean driving distance is equal to 235

Explanation / Answer

The statistical software output for this problem is:

One sample Z summary hypothesis test:
? : Mean of population
H0 : ? = 235
HA : ? < 235
Standard deviation = 45.5

Hypothesis test results:

Hence,

a) Test statistic = -0.775

b) P - value = 0.2193

c) Final conclusion:

There is not sufficient evidence to warrant rejection of the claim that the mean driving distance is equal to 235

Option B is correct.

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