Question Completion Status: Support ? QUESTION 7 7) A sample of the number of study hours per week of college students is listed below STUDY HOURS 10 20 24 34 36 42 Z-SCORE -2.5 -1.75 -0.5 0 1.25 1.5 2.25 %ILE RANK 10 25 35 40 50 75 95 By observation of the table, determine the mean O a. 24 O b. 34 O c.24.29 O d. none of the choices QUESTION 8 8) By observation of the table in question 7) determine the standard deviation O a. 14 O b.8 O c. none of the choices O d. 24 QUESTION 9 9) A random sample of 36 students averaged 9.06 hours of sleep on the weekend with a population standard deviation of 1.08 hours. Construct a 95% confidence interval for the mean amount of time students sleep on the weekend ( 2 decimal places ) O a. 7.98 to 10.14 O b. none of the choices O c. 8 to 10 O d. 8.71 to 9.41 QUESTION 10 10) Referring to question 9) determine the margin of error O a. none of the chocies O b.+ .3528 O c. 12.12 O d. +.8532