Suh lamp daily exposure 15 min 18 16 18 15 60 min 14 13 16 13 90 min LocationAla

Question

Suh lamp daily exposure 15 min 18 16 18 15 60 min 14 13 16 13 90 min LocationAlaska Florida 4 3. To test to see if grades were better on my second test in the summer (where students got extra credit for coming to all of the lectures) compared to this semester (where students are attending less regularly), I randomly selected test grades from each semester, and also separated them by gender. The data file is on the wiki (testdata.xlsx). Test to see if there are differences. Use 4 steps and ? = .05. MacBook Pro ?) 6 2 3 W E G HH

Explanation / Answer

List of formulae to be used..

Degree of Freedom

DF

Sum of Squares

SS

Mean Square

MS

Source

Degree of Freedom

DF

Sum of Squares

SS

Mean Square

MS

F-Stat P-Value Between Groups k-1 SSB = SUM(i=1 to k)ni(xi-x)2 MSB = SSB / (k-1) F = MSB / MSW Right tail of F(k-1,N-k) Within Groups N-k SSW = SUM(i=1 to k) (ni -1)Si2 MSW = SSW / (N-k) Total: N-1 SST = SSB + SSW

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