Sample of individuals age

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The national sleep foundation used a survey to determine whether hours of sleeping per night are independent of age.  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

fewer than 6

6 to 6.9

7 to 7.9

8 or more

total

49 or younger

38

60

77

65

240

50 or older

36

57

75

92

260

a. Conduct a test of independence to determine whether the hours of sleep on weeknights are independent of age. Use α =.05 what is the p-value and what is your conclusion.

b. What IS your estimate of the percentage of people who sleep fewer than 6hours, 6 to 6.9 hours, 7 to 7.9 hours and 8 or more hours on weeknights?

Reference no: EM1318449

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