Mathematics, 28.04.2021 16:00 hoboethan
In a random sample of 60 students in first grade, the mean hours of sleep per night was 9.6 with a standard deviation of 0.51. In a random sample of 40 students in 12th grade, the mean hours of sleep per night was 7.2 with a standard deviation of 0.62. Which interval is a 99% confidence interval for the difference between the mean hours of sleep?
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In a random sample of 60 students in first grade, the mean hours of sleep per night was 9.6 with a s...
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