For items 27 to 29: A professor wants to determine whether there is a difference in the final averages between the past two semesters. Of his business statistics classes. For a random sample of 16...

Extracted text: For items 27 to 29: A professor wants to determine whether there is a difference in the final averages between the past two semesters. Of his business statistics classes. For a random sample of 16 students from semester 1, the mean of the final averages was 75 with standard deviation of 4. For a random sample of 9 students from semester 2, the mean was 73 with standard deviation of 6. 27. If the final averages form semester 1 and 2 are assumed to be normally distributed with equal variances. Which of the following is the appropriate set of hypotheses? A. Ho: H1-2 S0 vs HA: H1- 42>0 B. Ho: H1 -H2 20 vs HA: 1 -H2 <0 c.="" ho:="" h1="" -="" 2="0" vs="" ha:="" h1-="" h2="" #0="" d.="" ho:="" h-42="" #="" 0="" vs="" ha:="" h1="" h2="0" %3d="" 28.="" what="" is="" the="" computed="" test="" statistics="" for="" the="" appropriate="" test?="" b.="" t="" 0.8944="" a.="" z="" 1.9964="" c.="" t="" 1.0018="" d.="" z="0.5009" %3d="" %3d="" 29.="" what="" is="" the="" correct="" decision="" for="" the="" appropriate="" test="" at="" a="" 0.05="" level="" of="" significance="" when="" the="" population="" variances="" are="" assumed="" to="" be="" equal?="" a.="" do="" not="" reject="" the="" null="" hypothesis.="" b.="" reject="" the="" null="" hypothesis="" c.="" reject="" the="" alternate="" hypothesis="" d.="" do="" not="" reject="" the="" alternate="" hypothesis.="" 30.="" which="" of="" the="" following="" is="" correct?="" a.="" the="" probability="" of="" type="" i="" error="" is="" b="" b.="" the="" probability="" of="" type="" two="" error="" is="" (1="" -="" bß)="" c.="" the="" probability="" of="" type="" ii="" error="" is="" a="" d.="" none="" of="" the="">