A 90% confidence intervals for the proportion of first-year statistics students with brown hair is given to be (0.28, 0.41).
What is the sample proportion of students with brown hair? Round to 3 decimal places, if needed.
What is the margin of error of this interval? (Round to 3 decimal places if needed)
What is the critical value used for this interval? Round to 3 decimal places, if needed)
What is the standard error of the estimate?
Round to 3 decimal places if needed:
What was the sample size? (Round to the appropriate integer:)