Posted by **Sheri** on Monday, July 9, 2012 at 3:16pm.

A sample of 200 students in a English class were asked- How long did you sleep last night?

sample mean: 6.4 hours

S.D. = 1.6 HOURS

Standard Error = .11 hours

sample size = 200

What type of data is used in this example?

my answer: MEASUREMENT DATA

What would happen to the size of the Margin of error or confidence interval if the level of confidence were instead 68% and why?

My answer: the Margin of error would decrease because the level of confidence increased????

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