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Multiple-choice questions 1) Which of the following values of r represents the strongest relationship between 2 variables?
Multiple-choice questions
1) Which of the following values of r represents the strongest relationship between 2 variables?
a. 0.55
b. 0.00
c. 0.78
d. -0.80
2) YandX are correlated linearly, if 49% of the total variability of Y is accounted by X, what is the value of r?
a. 0.49
b. 0.51
c. 0.70
d. 0.30
3) The least-squares regression line minimizes _____.
a. s
b. sY.X
c. ∑(Y-Y')2
4) the total degree of freedom for an ANOVA with n1=10, n2=12, n3=10 is _____.
a. 2
b. 32
c. 31
d. 29
5) By doing multiple t tests when there are more than 2 experimental groups we are increasing the risk
of making what kind of mistake?
a. Accepting H0
b. Type I error
c. Type II error
d. All of the above
6) An ANOVA compares 6 groups with 6 subjects in each group, α=.01. In Tukey's HSD, q value is
_____.
a. 4.30
b. 4.23
c. 5.24
d. 5.37