Which of the following examples involves paired data? a. A ...

[cagreen833]

Which of the following examples involves paired data?
 a. A psychologist compares two methods of memorizing information. Twenty people use one method and twenty other people use the second method.
  b. A researcher estimates the difference between the mean forearm lengths of men and women based on a random sample of each.
  c. A medical researcher measures the cholesterol levels of each of 30 heart attack patients 2 days after the attack and again 4 days after the attack.
  d. A marketing research expert estimates the proportion of the 22 to 29 year-old age group that says they might buy a new car in the next two years

Question 2

In each situation, indicate whether it would make more sense to find a confidence interval for the population parameter or to conduct a hypothesis test for a specific null value. The school board wishes to find out if the newly adapted teaching method for K-5 math has resulted in higher average grades.
 a. Confidence interval
  b. Hypothesis test

[carolinefletcherr]

Answer to Question 1

C

Answer to Question 2

B