Chapter 5 Flashcards
One group of children participated in a study. In one condition they wore a weighted vest, and in the other they wore an unweighted vest. The inferential statistic used to compare the differences between the two conditions is
a. Dependent sample 1-test
b. Independent sample -test
c. One-way ANOVA
d. Repeated measures ANOVA
Dependent sample 1-test
Which of the following difference statistics is an example of a within-group comparison?
a. One-way ANOVA
b. Analysis of covariance
c. Independent sample -test
d. Dependent sample 1-test
Dependent sample 1-test
When conducting a 1-test, if all other factors are equal, there is more likely to be a statistically significant difference between groups if
a. Variability is small
b. The sample size is small
c. The effect size is small
d. The mean difference between groups is small
Variability is small
Which statistic would be most helpful in determining if the impact that an intervention had on an outcome is large enough that it could be clinically significant?
a. 95% CI = 2.1-7.3
b. p = 0.001
c. df = 3, 276
d. d = 1.62
d. d = 1.62
A research study reports that the mean = 5.4, 95% CI [3.2, 7.9]. Which of the following is the best interpretation of the confidence interval?
a. 95% of the sample had a score between 3.2 and 7.9.
b. You can be 95% sure that the mean of 5.4 is correct.
c. The population has a mean that falls between 3.2 and 7.9.
d. The mean is not statistically significant.
c. The population has a mean that falls between 3.2 and 7.9.
Which statistic gives you information about the likelihood of making a Type II error?
a. Alpha level
b. Power
c. Confidence Interval
d. Effect size
power
A study comparing conventional treatment and a new intervention finds no interaction effect, but it does find a main effect for time. Which interpretation of the findings is most accurate?
a. Neither group improved.
b. The new intervention group improved more than the conventional treatment group.
c. Both groups improved, but one group did not improve more than the other.
d. The conventional treatment group improved more than the new intervention group.
Both groups improved, but one group did not improve more than the other.
Adults with traumatic brain injury, schizophrenia, and dementia are compared on a measure of executive function. Which statistic would be used to determine if there is a difference between the three groups?
a. Dependent sample t-test
b. Independent sample t-test
c. Chi-square
d. One-way ANOVA
d. One-way ANOVA
In a randomized controlled trial with a pretest and posttest, which comparison is most important for determining if the intervention condition is more effective than the control condition?
a. Main effect for time
b. Main effect for group
c. Post-hoc comparison
d. interaction effect
interaction effect
A study compares the percentage of males and females in an OT class with the percentage of males and females in a PT class. Which statistic would be used to determine if there is a difference?
a. Dependent sample t-test
b. Independent sample t-test
c. Chi-square
d. One-way
Chi-square
