PCAT Statistics 3

Question 1

Which of the following best describes a Type II error?

Accepted Answer

Failing to reject a false null hypothesis

Answer

A Type II error (β) occurs when you fail to detect a real effect — failing to reject a false null hypothesis.

Question 2

A pharmacist records pill weights: 98, 100, 102, 100, 99, 101, 100. What is the mode?

Accepted Answer

100

Answer

100 appears three times, more than any other value, making it the mode.

Question 3

What does a correlation coefficient of r = -0.85 indicate?

Accepted Answer

A strong negative linear relationship

Answer

Values of r close to -1 indicate a strong negative linear relationship between two variables.

Question 4

In a right-skewed distribution, which ordering is correct?

Accepted Answer

Mean > Median > Mode

Answer

In a right-skewed distribution, the tail pulls the mean higher than the median, which is higher than the mode.

Question 5

A study finds that taking aspirin reduces headache duration. This is an example of what type of relationship?

Accepted Answer

Causal relationship

Answer

Randomized controlled experiments establish causal relationships when confounders are properly controlled.

PCAT - Pharmacy College Admission Test Practice Test