Posted by **Kim** on Sunday, April 29, 2012 at 8:20pm.

The PGA would like to test to see if there is any difference in the distance produced by Titleist and Maxfli brand golf balls. A sample of 36 Titleist golf balls produced x1bar = 292ft, s1=16ft, while a sample of 48 Maxfli golf balls produced x2bar = 281ft, s2 20ft. Find a 90% confidence interval for the difference in mean distances.

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