Deck 12: Statistical Inference

Question 1

The _________________ refers to the range of likely values associated with a given probability or confidence level.

Answer 1

Confidence interval

Question 2

When using a t-test, a confidence level of 0.90 is associated with an alpha level of

A) 1.00
B) 0.10
C) 0.01
D) 0.001

Answer 2

B

Question 3

The general form of a confidence interval is

A) Standard error ± critical value × estimated parameter value
B) Critical value ± estimated parameter value × standard error
C) Estimated parameter value ± standard error × critical value

Answer 3

C

Question 4

If the observed statistic's absolute value is greater than or equal to the critical value, you should _________ the null hypothesis.

A) Accept
B) Reject
C) Revise
D) Supplement

Question 5

As the sample size increases, the t-distribution approaches the shape of the ____________.

A) Binomial distribution
B) Sample
C) Normal distribution
D) Population

Question 6

In order to test a hypothesis using the t-table one needs a confidence level, the number of tails and the _____________.

A) Sampling distribution
B) Probability estimate
C) Alpha
D) Degrees of freedom

Question 7

What is the difference between hypothesis testing and point estimation?

Question 8

To claim that a result of a hypothesis test is statistically significant is to assert that a (null) hypothesis has been rejected with a specified probability of making a ______ error.

A) Type I
B) Type II
C) Random
D) Systematic

Question 9

A ___________ is the incorrect or mistaken rejection of a true null hypothesis.

A) Type I error
B) Type II error
C) Both of the above
D) None of the above

Question 10

A _______ score is the number of standard deviations by which a score deviates from the mean score.

Question 11

A hypotheses stating that there is no relationship is usually called a ________ hypothesis.

A) Alternative
B) Research
C) Null
D) Vacant

Question 12

A score of 1.96 means that the observed value is _____ standard deviations above the mean.

A) 0.196
B) 1.96
C) 19.6
D) 196

Question 13

A z-test uses the __________ distribution to test statistical significance.

Question 14

A ___________ is failing to reject a false null hypothesis.

A) Type I error
B) Type II error
C) Both of the above
D) None of the above

Question 15

A t-test uses the ___________ distribution to test statistical significance.

Question 16

Sampling distributions tell us the probability that our estimates fall within certain distances of the ______________.

A) Sample mean
B) Population standard deviation
C) Population parameter
D) Critical value

Question 17

As the standard deviation increases in size, the standard error of the mean _________.

A) Increases
B) Decreases
C) Remains the same
D) Is not affected

Question 18

A _________ distribution is a mathematical function that indicates the probability of different values of the estimator occurring.

A) Population
B) Null
C) Normal
D) Sampling