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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?


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????

  • statistics - ,

    You used measures of central tendency and variability.

    What was it before it was 68%? If the confidence interval increased, then your answer would be right.

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