Question

r. Garcia is interested in evaluating the proportion of all Aggie undergraduates who get less than 8 hours of sleep per night. She conducted a survey of 100 undergraduates at Texas A&M found that 60 of them get less than 8 hours sleep per night.

Provide a 99% confidence interval of the population proportion.

Selected Answer:	0.6 +/- 1.645 s /100 where s is the sample standard deviation of sleep.
Answers:	0.6 +/- 1.645 s /100 where s is the sample standard deviation of sleep.
	0.6 +/- 0.126
	0.6 +/- 0.081
	0.6 +/- 0.096
	0.6 +/- 0.006

How do you compute confidence intervals for population proportions? Do you use a z-test or a t-test?

Answer 1

Ans : 0.6+_0.126

How do you compute confidence intervals for population proportions?

Ans : z test