A college professor collected information on 430 students including their year i
ID: 3310044 • Letter: A
Question
A college professor collected information on 430 students including their year in school (freshman, sophomore, junior and senior) and their current college GPA. The resulting data was used to create this ANOVA table. Several values have been deleted.
Source
DF
Sum of Squares
Mean Square
F Value
Pr > F
Model
3
0.996
0.332
CCC
0.3304
Error
426
BBB
0.290
Corrected Total
AAA
124.519
The total degrees of freedom is missing (replaced by AAA). What is this value?
Source
DF
Sum of Squares
Mean Square
F Value
Pr > F
Model
3
0.996
0.332
CCC
0.3304
Error
426
BBB
0.290
Corrected Total
AAA
124.519
Explanation / Answer
Ans:
Total df=430-1=429
Sum of squares (Error)=total SS-SS(model)=124.519-0.996=123.523
MS=SS/df
F=MS(model)/MS(error)=0.332/0.290=1.145
p-value=fdist(1.145,3,426)=0.3304
Source DF Sum of Squares Mean Square F Value Pr > F Model 3 0.996 0.332 1.145 0.3304 Error 426 123.523 0.290 Corrected Total 429 124.519Related Questions
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