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..not equal to 8 hours ..less than 8 hours. .not equal to 7.5 hours D .less than 7.5 hours

..not equal to 8 hours ..less than 8 hours. .not equal to 7.5 hours D .less than 7.5 hours

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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The National Sleep Foundation recommends that teenagers aged 14 to 17 years old get at least 8 hours of sleep per night for proper health and wellness. A statistics class at a large high school suspects that students at their school are getting less than 8 hours of sleep on average. To test their theory, they randomly sample 42 of these students and ask them how many hours of sleep they get per night. The mean from the sample is = 7.5 hours. Here's their alternative hypothesis: Ha : The average amount of sleep students at their school get per night is... What is an appropriate ending to their alternative hypothesis?
Transcribed Image Text:The National Sleep Foundation recommends that teenagers aged 14 to 17 years old get at least 8 hours of sleep per night for proper health and wellness. A statistics class at a large high school suspects that students at their school are getting less than 8 hours of sleep on average. To test their theory, they randomly sample 42 of these students and ask them how many hours of sleep they get per night. The mean from the sample is = 7.5 hours. Here's their alternative hypothesis: Ha : The average amount of sleep students at their school get per night is... What is an appropriate ending to their alternative hypothesis?
A ...not equal to 8 hours B. ..less than 8 hours. ...not equal to 7.5 hours D ...less than 7.5 hours
Transcribed Image Text:A ...not equal to 8 hours B. ..less than 8 hours. ...not equal to 7.5 hours D ...less than 7.5 hours
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