Psyc 301 - Module 2 Updated Actual Questions And Correct Answers

PSYC 301 - MODULE 2 UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
Question:
1. Primary goal of random sampling
Answer:
To increase generalizability to the population of interest.

Question:
2. How small sample size affects NHST
Answer:
NHST is conservative, requiring substantial differences for significance due to higher sample
deviation impact.

Question:
3. How large sample size affects NHST
Answer:
NHST is less conservative, detecting modest differences as significant because sampling error is low.

Question:
4. μ (Mu)
Answer:
Population mean (usually estimated).




Question:
5. X̄ (X-bar)
Answer:
Sample mean.

Question:
6. SE
Answer:
Standard error.

Question:
7. S
Answer:
Sample standard deviation.

Question:
8. n

, Answer:
Sample size.

Question:
9. β (Beta)
Answer:
Probability of a Type II error.

Question:
10. D
Answer:
Difference scores of sample data.

Question:
11. D̄
Answer:
Mean of difference scores.

Question:
12. μd
Answer:
Mean of the difference scores in the population.

Question:
13. Difference between standard deviation and variance
Answer:
Standard deviation is in original units; variance is measured in squared units.

Question:
14. What does an independent samples t-test test?
Answer:
The difference in means between two distinct groups of people.

Question:
15. What is the null hypothesis for an independent samples t-test?
Answer:
The mean of the two independent populations are equal.

Question:
16. What does it mean for populations to be independent of each other?
Answer:
Being a member of one population precludes membership in the other.

Question:
17. What is the generic formula for t-tests?
Answer:
t = sample data - hypothesized population parameter/estimate of standard error