ISDS 2000 ch 13 quiz

Fisher's LSD method is applied when the _________________. a. the ANOVA null hypothesis is rejected b. the ANOVA null hypothesis is not rejected c. either A or B occur d. neither A or B occur

a

Tukey's Honestly Significant Differences (HSD) method ensures that the probability of at least one Type I error remains fixed irrespective of the number of ________________. a. pairwise comparisons b. treatments c. replications within each treatment d. replications for each combination of factor A and factor B

a

When using Fisher's LSD method with a given significance level for each interval, the probability of committing a Type I error for at least one comparison increases as the number of _________________________. a. pairwise comparisons decreases b. pairwise comparisons increases c. sample size increases d. treatments decreases

b

If the interaction between two factors is not significant, the next tests to be done are ___________________. a. none, the analysis is complete b. none, gather more data c. tests about the population means of factor A or factor B using two-way ANOVA without interaction d. Tukey's confidence intervals

c

In a two-way ANOVA test, how many null hypotheses are tested? a. 1 b. 1 or 2 c. 2 or 3 d. more than 3

c

If there are five treatments under study, the number of pairwise comparisons is _______. a. 15 b. 5 c. 20 d. 10

d

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