Statistics Test 3

Question 1

What management question is asked in one-sample tests of hypothesis?

Answer 1

.

Question 2

The plural of hypothesis is:

Answer 2

hypotheses

Question 3

What is inferential statistics?

Answer 3

To draw a sample and make inferences about the population

Question 4

Define p-value:

Answer 4

probability of a Type 1 error

Question 5

From the statistics point of view, what is the job of senior managers?

Answer 5

to change parameters

Question 6

If alpfa = .01 for H1: Mu<$4.50, the Z value for rejection zone is:

Answer 6

-2.33

Question 7

To test the fairness of a coin, we flip it four times expecting to get two heads & two tails. When we get the improbable outcome of four heads, we conclude that the coin is unfair. If the coin is unfair, it would be a:

Answer 7

D) correct decsion

Question 8

To test the fairness of a coin, we flip it four times expecting to get two heads & two tails. When we get the improbable outcome of four heads, we conclude that the coin is unfair. If we made an error, it would be a:

Answer 8

A) Type 1 error

Question 9

If a person accused of a crime is telling the truth about her whereabouts at the time of the crime, but the police don’t believe her, they made a:

Answer 9

A) Type 1 error

Question 10

Type 1 error is also called a:

Answer 10

E) alpha

Question 11

If alpha = 0.05 for a non-directional test, how large is the area in the upper tail?

Answer 11

C) 0.025

Question 12

What is the Z value in the LEFT tail for a non directional test at a one percent alpha?

Answer 12

-2.57

Question 13

In tests of hypothesis, how do we use test outcomes to make decisions about whether to accept or reject null hypotheses?

Answer 13

.

Question 14

How is the sample proportion defined?

Answer 14

B) x/n

Question 15

The sign of H1 is based on:

Answer 15

C) the context

Question 16

Why is the sign of the null hypothesis always equal (=)?

Answer 16

.

Question 17

The null and alternative hypotheses are always written as:

Answer 17

D) parameters

Question 18

Why do we control the Type 1 error?

Answer 18

Because its more serious and only 5% of probability that we reject true null hypothesis

Question 19

About what do null hypotheses make claims?

Answer 19

E) All of these four answers (population parameters, sample statistics, sample means or proportions, the context)

Question 20

When we tested the fairness of a peso with four and 12 flips, we did not use the normal curve table. Yet in all other tests, we routinely used it. Why did we switch to the normal curve table?

Answer 20

.

Question 21

The singular of criteria is:

Answer 21

D) criterion

Question 22

In all test of hypothesis, two transformations are made, one with a normal curve table and a second with a formula. Both are made into:

Answer 22

E) Z

Question 23

Sampling and tests of hypotheses share which of these characteristics?

Answer 23

A) They are about parameters

Question 24

One-sample tests of hypothesis may be considered a decision-making tool about whether management initiatives worked.

Answer 24

True

Question 25

In tests of hypothesis about two proportions, of what is the polygon of all possible outcomes composed?

Answer 25

All possible “differences” p1-p2

Question 26

Define Type II error.

Answer 26

Accept the null hypothesis when it is false

Question 27

In forming the sign of H1, we occasionally use information contained in step 5 about test outcomes.

Answer 27

True

Question 28

Name a synonym for alpha:

Answer 28

.

Question 29

What is a hypothesis?

Answer 29

a statement about population parameters that is subject to verification.

Question 30

Who established a major part of the classical theory of tests of hypotheses asserting, “The null hypothesis is exact”?

Answer 30

C) Fisher

Question 31

In all tests of hypothesis, test outcomes result from either random variation or:

Answer 31

Management Initiatives

Question 32

Sampling & tests of hypotheses share which of these characteristics?

Answer 32

F) All these answers are true(They are about parameters, They are concerned with parameters written in Greek capital letters, They are inferential methods, They ask questions about populations, They are useful for decision-making in business)

Question 33

Instead of deriving an entire sampling distribution by hand a test of hypothesis, a short-cut to the derivation is to:

Answer 33

Use SPSS