Please help with these.

The National Sleep Foundation used a survey to determine whether hours of sleep per night are independent of age (Newsweek, January 19, 2004). 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 of Sleep 39 or younger 40 or older TOTAL TOTAL 240 260 500 a) State the hypotheses. b) Below is a table showing the expected counts. Calculate the missing values. Hours of Sleep 39 or younger 40 or older Fewer than 6 6 to 6.9 7 to 7.9 S or more [31: ?2= 6 to 6.9 7 to 7.9 8 or more 12 =.17+.16+.26+?3+?4+.21+1.42+1.31=?5 ?3= ?4= r35: (1) What is the critical value you want to compare with to draw the conclusion? e) What is your conclusion? Is hours of sleep per night independent of age