Testing a Claim about a Difference between Proportions

Question 1

Which of the following are the correct hypotheses for this test?

Revolt · Accepted Answer

H0: = 0 versus Ha: > 0 where pD = the proportion of all dogs that can be trained to fetch a ball and pC = the proportion of all cats that can be trained to fetch a ball.

Question 2

✔ less thangreater thanequal to

Revolt · Accepted Answer

✔ less than

Question 3

✔ rejectfail to reject

Revolt · Accepted Answer

✔ reject

Question 4

✔ havedo not have

Revolt · Accepted Answer

✔ have

Question 5

less than✔ greater thanequal to

Revolt · Accepted Answer

✔ greater than

Question 6

An analyst in the department of research and development is trying to better understand what factors cause a printer to jam when completing 2-sided printing. He has 80 printers that he randomly allocates evenly to 2 treatments: regular paper and cardstock paper. He sends a 20-page 2-sided document to each printer and finds that 5 of the 40 printers using regular paper jam and 15 of the 40 printers using cardstock paper jam. Do these data provide convincing evidence that the proportion of printers that would jam while printing 2-sided on regular paper is less than the proportion that would jam while printing 2-sided on cardstock? Use .

Revolt · Accepted Answer

✔ equals zero; H0: versus Ha: where pR = the of all printers that jam while printing 2-sided on regular paper and pC = the of all printers that jam while printing 2-sided on cardstock paper.: equals zero; H0: versus Ha: where pR = the of all printers that jam while printing 2-sided on regular paper and pC = the of all printers that jam while printing 2-sided on cardstock paper.: is less than zero; H0: versus Ha: where pR = the of all printers that jam while printing 2-sided on regular paper and pC = the of all printers that jam while printing 2-sided on cardstock paper.: proportion

Question 7

equals zerois greater than zero✔ is less than zero

Revolt · Accepted Answer

✔ is less than zero

Question 8

✔ proportionmeannumbercount

Revolt · Accepted Answer

✔ proportion

Question 9

✔ proportionmeannumbercount

Revolt · Accepted Answer

✔ proportion

Question 10

For this test, z = –2.58 and the P-value = 0.0049.

Revolt · Accepted Answer

Because the P-value of 0.0049 = 0.05, we H0. We convincing evidence that the proportion of printers that would jam while printing 2-sided on regular paper the proportion that would jam while printing: is less than; Because the P-value of 0.0049 = 0.05, we H0. We convincing evidence that the proportion of printers that would jam while printing 2-sided on regular paper the proportion that would jam while printing: reject; Because the P-value of 0.0049 = 0.05, we H0. We convincing evidence that the proportion of printers that would jam while printing 2-sided on regular paper the proportion that would jam while printing: have

Testing a Claim about a Difference between Proportions Answers

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