Out of 800 people sampled, 432 use cream in their coffee. Based on this, construct a 98% confidence interval for the true population proportion of people who use cream in their coffee. Give your answers to three decimal places for each part. You may carry the rounding down throughout the problem. Showing work is required. 1. State the value of the estimate of the population proportion. 2. Calculate value of the standard error. 3. Should you use z or t in your confidence interval calculation? Select an answer v 4. Determine the value of z or t that you need to use for your confidence interval, and state it. 5. Calculate the margin of error for your interval. 6. Calculate the 98% confidence interal.

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Question 15
E 8 pts O1 O Details
Out of 800 people sampled, 432 use cream in their coffee. Based on this, construct a 98% confidence
interval for the true population proportion of people who use cream in their coffee.
Give your answers to three decimal places for each part. You may carry the rounding down throughout the
problem.
Showing work is required.
1. State the value of the estimate of the population proportion.
2. Calculate value of the standard error.
3. Should you use z or t in your confidence interval calculation? (Select an answer
4. Determine the value of z or t that you need to use for your confidence interval, and state it.
5. Calculate the margin of error for your interval.
6. Calculate the 98% confidence interal.
Add Work
Question 16
E1 pt 01 0 Details
If the bounds for a confidence interval for the difference in population proportions Pi - P2 are both
positive, then this suggests which of the following?
O The two population proportions might be the same.
The first population proportion is greater than the second.
O No comparison can be made between the two population proportions.
O The first population proportion is less than the second.
Next Page
Transcribed Image Text:Question 15 E 8 pts O1 O Details Out of 800 people sampled, 432 use cream in their coffee. Based on this, construct a 98% confidence interval for the true population proportion of people who use cream in their coffee. Give your answers to three decimal places for each part. You may carry the rounding down throughout the problem. Showing work is required. 1. State the value of the estimate of the population proportion. 2. Calculate value of the standard error. 3. Should you use z or t in your confidence interval calculation? (Select an answer 4. Determine the value of z or t that you need to use for your confidence interval, and state it. 5. Calculate the margin of error for your interval. 6. Calculate the 98% confidence interal. Add Work Question 16 E1 pt 01 0 Details If the bounds for a confidence interval for the difference in population proportions Pi - P2 are both positive, then this suggests which of the following? O The two population proportions might be the same. The first population proportion is greater than the second. O No comparison can be made between the two population proportions. O The first population proportion is less than the second. Next Page
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