Question
The National Sleep Foundation used a survey to determine whether hours of sleeping per night are...
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 | |||||||
| Age | Fewer than 6 | 6 to 6.9 | 7 to 7.9 | 8 or more | Total | ||
| 49 or younger | 39 | 55 | 70 | 76 | 240 | ||
| 50 or older | 30 | 61 | 76 | 93 | 260 | ||
Conduct a test of independence to determine whether the hours of
sleep on weeknights are independent of age. Use = .05.
Use Table 12.4.
Compute the value of the 2 test statistic (to 2
decimals).
The p value is Selectless than .005between .005 and
.01between .01 and .025between .025 and .05between .05 and
.10greater than .10Item 2
What is your conclusion?
SelectConclude age and hours of sleep are not independentCannot
reject the assumption that age and hours of sleep are
independentItem 3
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 (to 1 decimal).
| Less than 6 hours | % |
| 6 to 6.9 hours | % |
| 7 to 7.9 hours | % |
| 8 or more hours | % |
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The National Sleep Foundation used a survey to determine whether hours of sleeping per night are...
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
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Fewer than 6
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Total
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he National Sleep Foundation used a survey to determine whether hours of sleeping per night are...
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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
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Hours of
Sleep
Age
Fewer than 6
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7 to 7.9
8 or more
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49 or younger
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The National Sleep Foundation used a survey to determine whether hours of sleeping per night are...
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
Age
Fewer than 6
6 to 6.9
7 to 7.9
8 or more
Total
49 or younger
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The National Sleep Foundation used a survey to determine whether hours of sleeping per night are...
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
Age
Fewer than 6
6 to 6.9
7 to 7.9
8 or more
Total
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55
79
70
240
50 or older
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The National Sleep Foundation used a survey to determine whether hours of sleeping per night are...
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.
Age
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6 to 6.9
7 to 7.9
8 or more
Total
49 or younger
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The National Sleep Foundation used a survey to determine whether hours of sleeping per night are...
The National Sleep Foundation used a survey to determine whether
hours of sleeping per night are independent of age (Newsweek,
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sample of individuals age 50 and older. Hours of Sleep Age Fewer
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The National Sleep Foundation used a survey to determine whether hours of sleeping per night are...
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
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sample of individuals age 50 and older.
Hours of Sleep Age Fewer than 6 6 to 6.9 7 to 7.9 8 or more
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The National Sleep Foundation used a survey to determine whether hours of sleeping per night are...
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hours of sleeping per night are independent of age (Newsweek,
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indicate their age with categorical options: age 39 or younger and
age 40 or older. Sample data follow.
Hours...
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