Hypothesis Testing Review Flashcards
What are two differences between a dependent t-test and a Two-Way ANOVA with Repeated
Measures?
One – the number of groups within the independent variable (one for dependent t-test and two or more for Two-Way ANOVA with Repeated Measures).
Two – the number of times the dependent variable is measured (two times for the dependent t-test and two or more times for the Two-Way ANOVA with Repeated Measures).
What are two differences between a Two-Way ANOVA and a Two-Way ANOVA with
Repeated Measures?
One – the number of group’s independent variables (one for Two-Way ANOVA with Repeated Measures and two for Two-Way ANOVA).
Two – the number of times the dependent variable is measured (once for Two-Way ANOVA and two or more times for the Two-Way ANOVA with Repeated Measures).
What is the difference between an independent t-test and a One-way ANOVA?
The number of groups within the independent variable (two for the independent t-test and two
or more for the One-Way ANOVA)
A researcher wants to determine the effects of optimism training on recovery time in athletes. Injured athletes are randomly assigned to one of two training groups - no optimism training or weekly optimism training. The athletes are then measured on how long it takes them to return to play.
What are the independent and dependent variables, the null hypothesis, and which test would you use?
Independent variable: Optimism training
Dependent variable: Recovery time
Null hypothesis(es): The mean recovery time for no optimism training is equal to the mean recovery time for optimism training.
Statistical test? Independent t-test (or One-Way ANOVA)
A researcher is interested in the effect of teaching style on physical activity engagement. She pre-tests participants on the amount of physical activity they participate in, and then, she randomly assigns participants to one of two groups: teaching style A and teaching style B. After six weeks, participants are measured again on the amount of physical activity they participate in.
What are the independent and dependent variables, the null hypothesis, and which test would you use?
Independent variable(s): Teaching style
Dependent variable: Amount of physical activity
Null hypothesis(es): No difference in physical activity between the two teaching styles.
No difference in amount of pre-physical activity and post-physical activity.
No interaction.
Statistical test: Two-Way ANOVA with Repeated Measures
A researcher was interested in looking at the effects of exercise and gender on sleep quality. One hundred males and 100 females were randomly assigned to one of four groups: control (no exercise), exercise once a week for 30 minutes, exercise three times a week for 30 minutes, and exercise seven days a week for 30 minutes. After 10 weeks, participants were tested on how well they rated their sleep.
What are the independent and dependent variables, the null hypothesis, and which test would you use?
Independent variable(s): Exercise and gender.
Dependent variable: Sleep quality
Null hypothesis(es): No difference in sleep quality between males and females.
No difference in sleep quality between the four exercise groups.
No interaction.
Statistical test: Two-Way ANOVA
