AP Stats Ch 9 Tests of Significance 9.1/9.2

Given the following information, the z-value for the sample is -2.4. (Hint: z = (x-bar - μ)/(σ/√n))

x-bar = 68, μ = 71, σ = 7.5, n = 36

• True

• False

A Type I error is when we reject the null hypothesis when it is actually true

• False

• True

The correct null hypothesis is p = 0.48

• False

• True

A null hypothesis is the name of the claim we are trying to find evidence against.

• True

• False

What is it called when something is unlikely to happen by chance alone?

• statistically significant
• alpha
• confidence level
• probability

A sports publication states that 32% of married men cannot watch football games because their wives prevent it.  You think that this is untrue.  What is your null hypothesis?

• The proportion of married men who cannot watch football because their wives prevent it is 0.32.
• The proportion of married men who cannot watch football because their wives prevent it is greater than 0.32.
• The proportion of married men who cannot watch football because their wives prevent it is less than 0.32.
• The proportion of married men who cannot watch football because their wives prevent it is not 0.32.

Tags

CCSS.HSS.IC.B.3

H_a = k is not an option for an alternate hypothesis?

• True

• False

When making the decision regarding the null hypothesis, we should reject when the p-value is small.

• True

• False

The p-value of a hypothesis test is .0281. This result is significant at the 5% significance level.

• False

• True