Solution:
a. Conduct a test of independence to determine whether the hours of sleep on weeknights are independent of age
Compute the value of the test statistic.
Answer:
The p-value is
What is your conclusion?
Since the p-value = 0.4005 > 0.05, we conclude there is
strong evidence that hours of sleep on weeknights
are independent of age.
Explanation:
Where:
O are the observed frequencies
E are the expected frequencies
The observed frequencies are:
The expected frequencies are calculated as:
b. Using the total sample of 500, estimate the percentage of people who sleep 6, 6 to 6.9, 7 to 7.9, and 8 or more hours on weeknights.
Answer:
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 6 to 6.9 63 57 Fewer than 6 Age 49 or younger 50 or older a. Conduct a test of independence to determine whether the hours...
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 65 Age 19 or younger 50 or older a, conduct a test of independence to determine whether the hours of sleep on weeknights...
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 49 or younger 50 or older a. Conduct a test of independence to determine whether the hours of sleep on weeknights are independent of age. Use α =...
CheckK MV 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. Age 49 or younger 50 or older a. Conduct a test of independence to determine whether the hours of sleep on weeknights are independent of age....
A survey was conducted to determine whether hours of sleep per night are independent of age. A sample of individuals was asked to indicate the number of hours of sleep per night with categorical options: fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more. Later in the survey, the individuals were asked to indicate their age with categorical options: age 39 or younger and age 40 or older. Sample data follow Age...
A survey was conducted to determine whether hours of sleep per night are independent of age. A sample of individuals was asked to indicate the number of hours of sleep per night with categorical options: fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more. Later in the survey, the individuals were asked to indicate their age with categorical options: age 39 or younger and age 40 or older. sample data follow. Age...
A survey was conducted to determine whether hours of sleep per night are independent of age. A sample of individuals was asked to indicate the number of hours of sleep per night with categorical options: fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more. Later in the survey, the individuals were asked to indicate their age with categorical options: age 39 or younger and age 40 or older. Sample data follow. Hours...
to of age A options: fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more. Later in the options: age 39 or younger and age 40 or older. Sample data follow. 6 to 6.9 7 to 7.9 of age. Ha: Hours of sleep per night is not mutually exclusive from age. Find the value of the test statistic. (Round your answer to three decimal places.) What Is the p-value? (Round your answer to...
A survey cunducted o de errm'าษ whether hours u eep per r "yht dre r dependent of dye. A sample U Individuals was e'sked o indicate he nur er u huurs o sleep per mqht with ca euricd options: ev e u dn 6 hours, 6 to 6.9 hours 7 to 7.9 hours dnd ε huurs or more. Later in the survey, the individuas were asked to indicate their age with categorical options: age 39 or yournger and age 40...
The results of a national survey showed that on average, adults sleep 6.7 hours per night. Suppose that the standard deviation is 1.9 hours and that the number of hours of sleep follows a bell-shaped distribution. If needed, round your answers to two decimal digits. (a) Use the empirical rule to calculate the percentage of individuals who sleep between 2.9 and 10.5 hours per day. Enter your answer as a percentage. (b) What is the z-value for an adult who...