Questions 17-18. A researcher has a large number of data set on age and height o
ID: 3312867 • Letter: Q
Question
Questions 17-18. A researcher has a large number of data set on age and height of humans from birth to age 70. He computes a correlation coefficient. 17. Would you expect the correlation coefficient to be positive or negative? 18. Do you expect the correlation to stand (to be valid) for all ages? Yes, No. 19. Complete following ANOVA table (Score 6) Source Degrees of freedom Sum of Squares Mean Sq Treatment Error Total aresFRatioP-value 10 4.82? 5.61 20. One-way ANOVA was conducted for 4 treatment groups with 6 subjects in each group. W would be the decision about Ho if is set at 0.05? (Score 10) Source Sum of Squares Degrees of freedom Mean Squares FRatioPva Treatment 33 Error Total 145 iSExplanation / Answer
Ans:
17)As,age increases ,height increase,so positive correlation is expected.
19)No
df(error)=33-10=23
MS=SS/df
F=MS(treatments)/MS(error)=4.82
p-value=fdist(4.82,10,23)=0.0009
20)
df(treatments)=4-1=3
df(error)=24-4=20
As,p-value>0.05,we fail to reject null hypothesis.
source df SS MS F p-value Treatment 10 270.40 27.04 4.82 0.0009 Error 23 129.03 5.61 Total 33 399.43Related Questions
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