Preparing to Test a Claim about a Population Proportion

Question 1

Are the conditions for inference met? Random: We have a random sample of . 10%: 200 customers < 10% of . Large Counts: There are expected successes and expected failures, which are both at least .

Revolt · Accepted Answer

✔ customers; Selection 1: customers; Selection 2: all customers; Selection 3: 170; Selection 4: 30; Selection 5: 10

Question 2

all repeat customers✔ all customersall large companiesall purchases

Revolt · Accepted Answer

✔ all customers

Question 3

103085✔ 170

Revolt · Accepted Answer

✔ 170

Question 4

10✔ 3085170

Revolt · Accepted Answer

✔ 30

Question 5

✔ 103085170

Revolt · Accepted Answer

✔ 10

Question 6

What is the value of the test statistic? (Round to 2 decimal places.) What is the P-value of the test? (Enter 4 decimal places.)

Revolt · Accepted Answer

Part 1: -1.58; Part 2: 0.0571

Question 7

The P-value of this test is 0.0571. What conclusion should be made?

Revolt · Accepted Answer

Because the P-value of 0.0571 > α = 0.05, we fail to reject H0. We do not have convincing evidence that less than 85% of customers of this company are repeat customers.

Question 8

Are the conditions for inference met? Random: We have a random sample of . 10%: 100 adults < 10% of . Large Counts: np0 = n(1 − p0)= These values are both at least .

Revolt · Accepted Answer

adults; Selection 1: adults; Selection 2: all adults; Selection 3: 25; Selection 4: 75; Selection 5: 10

Question 9

What is the value of the test statistic? (Round to 2 decimal places.) What is the P-value of the test? (Enter 4 decimal places.)

Revolt · Accepted Answer

Part 1: 1.62; Part 2: 0.0526

Question 10

The P-value of this test is 0.0526. What conclusion should be made?

Revolt · Accepted Answer

✔ is greater than; Because the P-value of 0.0526 α = 0.01, we H0. We convincing evidence that 25% of adults would describe themselves as organized.: is greater than; Because the P-value of 0.0526 α = 0.01, we H0. We convincing evidence that 25% of adults would describe themselves as organized.: fail to reject; Because the P-value of 0.0526 α = 0.01, we H0. We convincing evidence that 25% of adults would describe themselves as organized.: have; Because the P-value of 0.0526 α = 0.01, we H0. We convincing evidence that 25% of adults would describe themselves as organized.: exactly

Preparing to Test a Claim about a Population Proportion Answers

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