Student survey data were used to report means and standard deviations for number

Question

Student survey data were used to report means and standard deviations for number of credits taken by students of various years (1, 2, 3, 4, or other): a. First a test was carried out to see if there was a significant difference among mean credits taken by students in those five year levels, resulting in an F statistic of 6.90 and P-value 0.000. Is there evidence of a significant difference? If so, which group had the lowest mean number of credits taken? b. Next the test was carried out, omitting the "other" students (several of whom studied only part-time), resulting in an F statistic of 2.03 and P-value 0.109. Is there evidence of a significant difference? If so, which group had the lowest mean number of credits taken?

Explanation / Answer

Sol:

F=6.90

p=0.000

p<0.05

reject null hypothesis

there is significant diff in means

other group has lowest mean number of credits taken

Solutionb:

F=2..03

p=0.109

p>0.05

Fail to reject null hypothesis

there is no significant differenc in 4 groups means

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