EPSE 482 FINAL EXAM Questions with Correct Solutions
Question:
1. T-test
Answer:
Used to test hypotheses about an unknown population mean wh en the value of population SD
is unknown
Question:
2. Estimated Standard Error
Answer:
How much error there is on average between the sample mean and the population mean
Question:
3. The shape of the t-distribution depends on
Answer:
Degrees of freedom
Question:
4. Assumptions of a one-sample t-test
Answer:
- Independent observations
- Population must be normal, if larger than 30 than it is robust to violations of this assumption
Question:
5. When estimated SE is higher, the t score is __
Answer:
Lower
Question:
6. Standard error is influenced by ____
Answer:
Sample variance and sample size
Question:
7. Confidence interval
, Answer:
An interval estimated accompanied by a specific level of confidence, tells us how confident we
are that we have captured the true population value in our interval
Question:
8. Factors that influence Confidence Intervals
Answer:
Level of confidence
- Higher con, higher interval width Sample Size
- High sample size, lower interval width Distribution of scores
- Higher variability, higher interval width Violations of assumptions
Question:
9. Assumptions of the two-sample t-test
Answer:
- Observations are independent
- Two populations are normal
- Two populations must have homogeneity of variance
Question:
10. Assumption of a related samples design
Answer:
- Observations are independent
- Distribution of difference scores must be normal
Question:
11. ANOVA
Answer:
An inferential procedure that allows for the testing of differences among two or more groups
Question:
12. Between treatments variance
Answer:
The variability in scores across treatment conditions (groups) Treatment effect + chance
Question:
13. Within treatments variance
Question:
1. T-test
Answer:
Used to test hypotheses about an unknown population mean wh en the value of population SD
is unknown
Question:
2. Estimated Standard Error
Answer:
How much error there is on average between the sample mean and the population mean
Question:
3. The shape of the t-distribution depends on
Answer:
Degrees of freedom
Question:
4. Assumptions of a one-sample t-test
Answer:
- Independent observations
- Population must be normal, if larger than 30 than it is robust to violations of this assumption
Question:
5. When estimated SE is higher, the t score is __
Answer:
Lower
Question:
6. Standard error is influenced by ____
Answer:
Sample variance and sample size
Question:
7. Confidence interval
, Answer:
An interval estimated accompanied by a specific level of confidence, tells us how confident we
are that we have captured the true population value in our interval
Question:
8. Factors that influence Confidence Intervals
Answer:
Level of confidence
- Higher con, higher interval width Sample Size
- High sample size, lower interval width Distribution of scores
- Higher variability, higher interval width Violations of assumptions
Question:
9. Assumptions of the two-sample t-test
Answer:
- Observations are independent
- Two populations are normal
- Two populations must have homogeneity of variance
Question:
10. Assumption of a related samples design
Answer:
- Observations are independent
- Distribution of difference scores must be normal
Question:
11. ANOVA
Answer:
An inferential procedure that allows for the testing of differences among two or more groups
Question:
12. Between treatments variance
Answer:
The variability in scores across treatment conditions (groups) Treatment effect + chance
Question:
13. Within treatments variance
