A simple random sample of 30 students was selected from a normally distributed population of high
school students. The following confidence intervals were calculated at 90, 95, and 99% confidence levels
to estimate the average number of hours of sleep the students got each night. Determine which
confidence level goes with each confidence interval.
Between 7.3 and 8.7 hours of sleep:
Between 7.0 and 9.0 hours of sleep:
Between 7.2 and 8.8 hours of sleep:
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