MGSC 291 Exam 3 Questions and
Answers Graded A+
Q: What is a sampling distribution? - Correct answer-A: The probability
distribution of a statistic (e.g., sample mean).
Q: What does the sampling distribution of the sample mean represent? - Correct
answer-A: Distribution of all possible sample means for samples of size n from a
population.
Q: What are the shape, center, and spread of the sampling distribution of the
sample mean? - Correct answer-A: Shape: normal (if n > 30), Center: μ, Spread:
standard error = σ / √n.
Q: What measures variability in a sampling distribution? - Correct answer-A:
Standard error.
Q: What are the steps in hypothesis testing? - Correct answer-State H₀ and Hₐ.
Choose α.
Collect data and calculate test statistic.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
Answers Graded A+
Q: What is a sampling distribution? - Correct answer-A: The probability
distribution of a statistic (e.g., sample mean).
Q: What does the sampling distribution of the sample mean represent? - Correct
answer-A: Distribution of all possible sample means for samples of size n from a
population.
Q: What are the shape, center, and spread of the sampling distribution of the
sample mean? - Correct answer-A: Shape: normal (if n > 30), Center: μ, Spread:
standard error = σ / √n.
Q: What measures variability in a sampling distribution? - Correct answer-A:
Standard error.
Q: What are the steps in hypothesis testing? - Correct answer-State H₀ and Hₐ.
Choose α.
Collect data and calculate test statistic.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
