Statistics week 10: True or False and MCQs

1. Estimation with the independent-measures t statistic is used to determine how much difference there is between two treatment means or two population means.
True
False

2. If you are using the data from a repeated-measures study to estimate the mean difference between two treatments, the width of the confidence interval will depend on the size of the sample mean difference.
True
False

3. A researcher conducts a study to determine whether a new drug is effective for treating high blood pressure. The researcher should use a hypothesis test, rather than estimation, to evaluate the data.
True
False

4. A sample in treatment I has a mean of M = 12 with SS = 23. A second sample is given treatment II and has M = 16 with SS = 29. If these data are used to estimate the population mean difference between the two treatments, then the point estimate would be 4 points.
True
False

5. What value(s) for t would be used for a point estimate of a population mean using a single-sample t statistic?
t = 0
t = ï?±1.00
t = ï?±1.96
cannot answer without additional information

6. In an analysis of variance, SStotal will always equal the sum of SSbetween and SSwithin.
True
False

7. A research report presents the results of the ANOVA as follows: F(2, 27) = 5.36, p < .05. Based on this report, you can conclude that the decision from the ANOVA was to reject the null hypothesis.
True
False

8. An analysis of variances produces dfbetween = 3 and dfwithin = 24. For this analysis, what is dftotal?
26
27
28
cannot be determined without additional information

9. A research report concludes that there are significant differences among treatments, with F(2,27) = 8.62, p < .01. If the same number of participants was used in all of the treatment conditions, then how many individuals were in each treatment?
7
9
10
cannot determine without additional information

10. The following table shows the results of an analysis of variance comparing two treatment conditions with a sample of n = 11 participants in each treatment. Note that several values are missing in the table. What is the missing value for the F-ratio?
Source SS df MS
Between xx xx 14 F = xx
Within xx xx xx
Total 154 xx

2
7
14
28