Which two of the following are correct decisions?

| August 30, 2017

Question
Which two of the following are correct decisions?

I. RejectingH0whenH0is correct.

II. RejectingH0whenH0is wrong.

III. Failing to rejectH0whenH0is correct.

IV. Failing to rejectH0whenH0is wrong.

Select one:

a. I, IIb. I, IIIc. I, IVd. II, IIIe. II, IVf. III, IV

Question 2
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Question text
A paramedic comes upon the scene of an accident and tests the hypotheses

H0:victim is alive versus

Ha:victim is dead.

What would be his/her type I error?

Select one:

a. Believing victim is dead when victim is really alive.b. Believing victim is dead when victim is dead.c. Believing victim is alive when victim is actually dead.d. Believing victim is alive when victim is alive.

Question 3
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Question text
Referring to the above question, which of the following errors is most serious?

Select one:

a. Believing victim is dead when victim is really alive.b. Believing victim is alive when victim is actually dead.

Question 4
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In general, if the error you considered most serious is the Type I Error, what should you set?as?

Select one:

a. 0.0001 which makes the Type I Error probability lowb. 0.10 which would make the Type II Error probability low.

Question 5
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Question text
The following situation applies toQuestions 5-7:

The CEO of a large company feels that redesigning the production line will increase output. She will test the hypotheses:

H0:Redesigning will not increase output.

Ha:Redesigning will increase output.

If she finds evidence to rejectH0, she will initiate an expensive redesign of the production line. What error will she make if she rejectsH0and initiates an expensive redesign when redesigning will not increase output?

Select one:

a. Type I errorb. Type II error

Question 6
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Question text
Which error would the CEO make by failing to rejectH0and failing to redesign the production line when redesigning would really increase output?

Select one:

a. Type I errorb. Type II error

Question 7
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Question text
Referring to question 5, what are the consequences of initiating an expensive redesign when redesigning will not increase output?

Select one:

a. Company pays for expensive redesign without recouping the cost with increased output.b. Company does not get the increased output that it could have had.

For testingH0:?= 10 versusHa:?< 10, what is the color of the area that represents?in the following two curves if?is really 10?

Select one:

a. red (Area to the left of the line on the top curve)b. beige (Area to the right of the line on the top curve)c. green (Area to the left of the line on the bottom curve)d. light blue (Area to the right of the line on the bottom curve)

Question 9
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Referring to the hypotheses and the graph in question 8, what color representspowerin the two curves if?is really 8?

Select one:

a. red (Area to the left of the line on the top curve)b. beige (Area to the right of the line on the top curve)c. green (Area to the left of the line on the bottom curve)d. light blue (Area to the right of the line on the bottom curve)

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