a. Conduct a test of independence to determine whether the hours of sleep on weeknights are independent of age. Use a.05. Use Table 12.4. Compute the value of the X test statistic (to 2 decimals). The p value is Select What is your conchusion? Select

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MECK Aty Work
The National Sleep Foundation used a survey to determine whether hours of sleeping per night are independent of age (Newsweek, January 19, 2004). The following show
the hours of sleep on weeknights for a sample of individuals age 49 and younger and for a sample of individuals age 50 and older.
Hours of Sleep
6 to 6.9
Age
Fewer than 6
7 to 7.9
8 or more Total
49 or younger
35
62
79
64
240
50 or older
a. Conduct a test of independence to determine whether the hours of sleep on weeknights are independent of age. Use a.05. Use Table 12.4.
35
57
80
88
260
Compute the value of the X test statistic (to 2 decimals).
The p value is Select
What is your conckusion?
Select
b, Using the total sample of 500, estimate the percentage of people who sleep less than 6, 6 to 6,9, 7 to 7.9, and 8 or more hours on weeknights (to1 decimal).
Less than 6 hours
6 to 6.9 hours
7 to 7.9 hours
8 or more hours
Check My Work
Transcribed Image Text:MECK Aty Work The National Sleep Foundation used a survey to determine whether hours of sleeping per night are independent of age (Newsweek, January 19, 2004). The following show the hours of sleep on weeknights for a sample of individuals age 49 and younger and for a sample of individuals age 50 and older. Hours of Sleep 6 to 6.9 Age Fewer than 6 7 to 7.9 8 or more Total 49 or younger 35 62 79 64 240 50 or older a. Conduct a test of independence to determine whether the hours of sleep on weeknights are independent of age. Use a.05. Use Table 12.4. 35 57 80 88 260 Compute the value of the X test statistic (to 2 decimals). The p value is Select What is your conckusion? Select b, Using the total sample of 500, estimate the percentage of people who sleep less than 6, 6 to 6,9, 7 to 7.9, and 8 or more hours on weeknights (to1 decimal). Less than 6 hours 6 to 6.9 hours 7 to 7.9 hours 8 or more hours Check My Work
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