Preparing to Estimate a Population Proportion

Question 1

Random condition: 10% condition: Large counts condition: Are the conditions for inference met?

Revolt · Accepted Answer

met; Selection 1: met; Selection 2: not met; Selection 3: not met; Selection 4: no

Question 2

Identify the z* critical value for constructing a confidence interval for one proportion using these confidence levels. You can reference the t distribution table to answer this question. Enter each answer to 3 decimal places. 90% confidence: 95% confidence: 99% confidence:

Revolt · Accepted Answer

Part 1: 1.645; Part 2: 1.960; Part 3: 2.576

Question 3

Question 164463

Revolt · Accepted Answer

164463

Question 4

108 plus-or-minus 1.645 StartRoot StartFraction 108 (1 minus 108) Over 240 EndFraction EndRoot

Revolt · Accepted Answer

0.45 plus-or-minus 1.645 StartRoot StartFraction 0.45 (1 minus 0.45) Over 240 EndFraction EndRoot

Question 5

Interpret this interval.

Revolt · Accepted Answer

We are 90% confident that the interval from 0.397 to 0.503 captures p = the true proportion of all US doctors who are satisfied with the current state of US health care.

Question 6

Question 164466

Revolt · Accepted Answer

1.960

Question 7

Question 164467

Revolt · Accepted Answer

2.576

Preparing to Estimate a Population Proportion Answers

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