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 255 yards on average. Suppose a random sample of 135 golfers be chosen so that their mean driving distance is 249.5 yards. The population standard deviation is 44.1 Use a 5% significance level. Calculate the followings for a hypothesis test where H_0: mu = 255 and H_1: mu

Explanation / Answer

here std error =std deviation/(n)1/2 =3.7955

hence test stat z=(X-mean)/std error =(249.5-255)/3.7955=-1.4491

b) p value =0.0737

there is not sufficient evidence to warrant...

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