a. Nationally, the population as a whole watches an average of 6.2 hours of TV per day. A random sample of 1,017 senior citizens reports watching an average of 5.9 hours per day with a standard deviation of 0.7. Is the difference significant?
b. The same sample of senior citizens reports that they belong to an average of 2.1 voluntary organizations and clubs with a standard deviation of 0.5. Nationally, the average is 1.7. Is the difference significant?
Already registered? Login
Not Account? Sign up
Enter your email address to reset your password
Back to Login? Click here