5. In a one- 5, 506.34. What are the degrees of freedom associated with Fratio?

Question

5. In a one- 5, 506.34. What are the degrees of freedom associated with Fratio? a. 5, 50 Way ANOVA comparing five treatment groups with 10 observations per group, the SST = 42.41and MSE- What are - b. 5,10 c. 4,45 d. 10, 45 hen comparing three treatment groups in a one-way ANOVA, the set up for null hypothesis would be H: , = 2 = , that is the effect of theSe three treatments is the same. In words, how would you state the alternative hypothesis H? a. The effect of at least one treatment group is different from the others. b Tre o o l hre reatment groups are different fom each other. c. Both are correct d. None is correct. 7. After rejecting the null hypothesis (Ho: all treatments are equal), a researcher decided to compute a 95% confidence interval for the difference between the means of treatment 1 and treatment 2 based on Tukey's procedure at -0.05. If the confidence interval does include zero a. the researcher can reject the Ho and accept the HA b. the researcher can reject the Ha and accept the Ho c. finding is inconclusive, the researcher cannot accept or reject either hypotheses d. th e researcher acceptance or rejection of either hypothesis depends on level of significance 8. In regression analysis, the variable used to predict another variable is called a. response variable b. regression variable c. independent variable d. dependent variable 9, A hypothesis test is conducted at the 5% level of significance to test whether the population correlation is zero. If the sample consists of 25 observations and the correlation coefficient is 0.60, then the computed test statistics would be a. 3.597 b. 2.071 c. 1.960 d. 1.645 10. Which of the following is not a characteristic of the F distribution? a. It is a continuous distribution b. It can never be negative c. It is a family based on two sets of degrees of freedom d. It describes the ratio of two sample means

Explanation / Answer

5.
As there are 5 treatment groups, numerator will have df = 4
Hence option C is correct

6.
b) The effect of at least one treatment gourp is different from the ohters.

7.
c) finding is inconclusive, the researcher cannot accept or reject either hypotheses

8.
c) Independent variable

9.
test statistics, t = r*sqrt(n-2)/sqrt(1-r^2)
t = 0.6*sqrt(25-2)/sqrt(1-0.6^2)
t = 3.5969

10.
d) it describes the ratio of two sample means

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