Question

Ace is a major manufacturer of golf equipment. Ace is developing a new more durable golf ball. The researchers are concerned that the changes made have significantly reduced the driving distance of the new ball. They perform an experiment comparing the new golf ball to the current model. The results of the study are below.

t-Test: Two Sample Assuming
Unequal Variances

	Current	New
Mean	270.28	267.50
Variance	76.61	97.95
Observations	40	40
Hypothesized Mean Difference	0
df	77
t Stat	1.328
P(T<=t) one-tail	0.094
t Critical one-tail	1.665
P(T<=t) two-tail	0.188
t Critical two-tail	1.991

Based on these results and alpha of .05, the researchers can conclude

A) that there is evidence that there is a significant difference between the two golf balls.

B) that there is no evidence that the current golf balls drive significantly farther than the new golf balls.    

C) that there is evidence that the current golf ball has a significant advantage over the new golf ball.

D) nothing.

Answer 1