8) Ina recent health survey, 333 adult respondents reported a history of diabetes out of 3573 respondents.Calculate the margin of error for a 90% confidence interval of the proportion of persons who reported a history of diabetes. (round to 3 decimal places)

9) Calculatethe minimum number of subjects needed for a research study regarding the proportion of respondents who reported a history of diabetes using the following criteria:

95% confidence, within 5 percentage points, and a previous estimate of 0.25

10) Calculatethe minimum number of subjects needed for a research study regarding the proportion of respondents who reported a history of diabetes using the following criteria:

95% confidence, within 5 percentage points, and a previous estimateis not known

11) What effect does the confidence level have on the minimum number of subjects needed for aresearch study? (check all that apply)

Increasing the confidence level will increase the minimum sample size needed.

Decreasing the confidence level will increase the minimum sample size needed.

Decreasing the confidence level will decrease the minimum sample size needed.

Changing the confidence level will have no effect on the minimum sample size needed.