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One sample tests for means

The National Sleep Foundation recommends that teenagers aged 1414-1717 get at least 88 hours of sleep per night for proper health and wellness. But do teens really get enough sleep?
A statistics class at a large high school suspects that students at their school are getting less than 88 hours of sleep. To test their theory, they randomly sample 4242 of these students and ask them how many hours of sleep they get per night.
The figure below displays information from a one-sample tt test about the mean using the collected data.
One-Sample T: Sleep
VariableNMeanStDevSE MeanT
Sleep (hours)427.51.60.12-2.03
Assuming that all the necessary conditions for this test of significance are met, what conclusion should be drawn at the α=0.01\alpha=0.01 level?
Choose 1 answer:
Choose 1 answer: