Hypothesis Tests

Front

What are the null and alternative hypotheses for a test regarding a part that should weigh 19 pounds?

Back

H₀: μ = 19, Hₐ: μ ≠ 19

Front

What does a P-value of 0.0304 indicate when α = 0.05?

Back

Reject the null hypothesis.

Front

What is the p-value for a hypothesis test claiming the President’s approval rating is higher than 46% based on a sample of 80 citizens?

Back

0.082

Front

What is the z-score for a sample of 90 items with 19 defective items when the limit is 18%?

Back

0.75

Front

What distribution is used when performing a test about the population proportion?

Back

z

Front

Define null hypothesis (H₀).

Back

A statement that there is no effect or no difference, and it is the hypothesis that the test seeks to nullify.

Front

Define alternative hypothesis (Hₐ).

Back

A statement that indicates the presence of an effect or a difference, opposing the null hypothesis.

Front

What is a significance level (α)?

Back

The probability of rejecting the null hypothesis when it is actually true, commonly set at 0.05.

Front

What does it mean to 'reject the null hypothesis'?

Back

It means there is sufficient evidence to support the alternative hypothesis.

Front

What is a Type I error?

Back

Rejecting the null hypothesis when it is true.