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September 4, 2015

Homework Help: statistics

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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