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02-01-2023
Mathematics

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A researcher claims that on average , high school students sleep less than middle school students. the researcher recorded the sleeping times of 49 middle school students and 55 high school students. for the middle school students , the mean daily time asleep was hours with standard deviation 0 2 for the high school students , the man daily time asleep was 7. 9 hours with standard deviation 5 hours condict two - sample - test to test the researcher claim on the 5 level

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