Ch. 9 AP Stats

Question 1

If the P-Value < α, we

Accepted Answer

Reject the Null Hypothesis

Question 2

Which of the following will NOT increase the power of a test?

Accepted Answer

Increase the Probability of a Type II Error

Question 3

A significance test with α = 0.1 ...

Accepted Answer

Will have the same conclusion as a 90% confidence interval

Question 4

In order to say that something is statistically significant...

Accepted Answer

P-value must be less than α

Question 5

We always assume that the null hypothesis is

Accepted Answer

True

Question 6

not rejecting a false null hypothesis

Accepted Answer

Type II Error, Type I Error

Question 7

The probability of a Type I error is

Accepted Answer

α

Question 8

If you wanted to ESTIMATE a parameter, you would use

Accepted Answer

a confidence interval

Question 9

probability of obtaining results at least as extreme as the observed results of hypothesis test, assuming H0 is correct

Accepted Answer

P-Value

Question 10

The probability of a Type II error is

Accepted Answer

β

Question 11

the rejection of a true null hypothesis

Accepted Answer

Type I Error

Question 12

The formula for the test statistic for a significance test involving means is

Accepted Answer

t=\frac{xbar-μ}{\frac{Sx}{\sqrt{n}}}

Question 13

When writing hypotheses, we must always use

Accepted Answer

parameters (mew, p, sigma)

Question 14

Conditions that we must check before conducting a significance test are..

Accepted Answer

Random, Normal, Independent, 10% condition

Question 15

In a significance test, we are looking for evidence for

Accepted Answer

The alternative hypothesis, Ha

Question 16

Which of these statements below is NOT an acceptable conclusion from a significance test?

Accepted Answer

Since P-value < α, We accept Ha

Question 17

The phrase "A statement of no difference" is often used to describe the

Accepted Answer

Null Hypothesis

Question 18

If the P-Value > α, we

Accepted Answer

Fail to Reject the Null Hypothesis

Question 19

The formula for the test statistic for a significance test involving proportions is

Accepted Answer

z=\frac{p.hat-p}{\sqrt{\frac{p\left(1-p\right)}{n}}}

Question 20

1 - β is one way to find the

Accepted Answer

Power of the Test

Questions 20