In order to compare the means of two populations, independent random samples of 135 observations are selected from each population, with the following results: Sample 1 Sample 2 2 T2 s1 = 185 s2 = 140...

 In order to compare the means of two populations, independent random samples of 135 observations are selected from each population, with the following results:

Extracted text: Sample 1 Sample 2 2 T2 s1 = 185 s2 = 140 (a) Use a 95 % confidence interval to estimate the difference between the population means (u, - U). < (h1="" –="" h2)="">< (b)="" test="" the="" null="" hypothesis:="" ho="" :="" (1="" –="" h2)="0" versus="" the="" alternative="" hypothesis:="" ha="" :="" (µ1="" –="" h2)="" #="" 0.="" using="" a="0.05," give="" the="" following:="" ()="" the="" test="" statistic="" z="(ii)" the="" positive="" critical="" z="" score="" (iii)="" the="" negative="" critical="" z="" score="" the="" final="" conclusion="" is="" o="" we="" can="" reject="" the="" null="" hypothesis="" (41="" –="" h2)="0" in="" favor="" ofthe="" alternative="" (41="" –="" h2)="" +="" 0.="" o="" there="" is="" not="" sufficient="" evidence="" to="" reject="" the="" null="" hypothesis="" (u1="" –="" 2)="0." (c)="" test="" the="" null="" hypothesis:="" h,="" :="" (µ1="" –="" h2)="29" versus="" the="" alternative="" hypothesis:="" h,="" :="" (µ1="" –="" µ2)="" 29.="" using="" a="0.05," give="" the="" following:="" (i)="" the="" test="" statistic="" z="(ii)" the="" positive="" critical="" z="" score="" (iii)="" the="" negative="" critical="" z="" score="" the="" final="" conclusion="" is="" o="" we="" can="" reject="" the="" null="" hypothesis="" (41="" –="" h2)="29" in="" favor="" of="" the="" alternative="" (41="" –="" hz)="" +="" 29.="" o="" there="" is="" not="" sufficient="" evidence="" to="" reject="" the="" null="" hypothesis="" (41="" -="" h2)="">