×
×

Hours of TV A random sample of college students aged 18 to

ISBN: 9780321838704 30

Solution for problem 10AYU Chapter Chapter 7.3

Fundamentals of Statistics | 4th Edition

• Textbook Solutions
• 2901 Step-by-step solutions solved by professors and subject experts
• Get 24/7 help from StudySoup virtual teaching assistants

Fundamentals of Statistics | 4th Edition

4 5 1 387 Reviews
15
2
Problem 10AYU

Hours of TV A random sample of college students aged 18 to 24 years was obtained, and the number of hours of television watched in a typical week was recorded.

 36.1 30.5 2.9 17.5 21 23.5 25.6 16 28.9 29.6 7.8 20.4 33.8 36.8 0 9.9 25.8 19.5 19.1 18.5 22.9 9.7 39.2 19 8.6

(a) Use the following normal probability plot to determine if the data could have come from a normal distribution.

(b) Determine the mean and standard deviation of the sample data.

(c) Using the sample mean and sample standard deviation obtained in part (b) as estimates for the population mean and population standard deviation, respectively, draw a graph of a normal model for the distribution of weekly hours of television watched.

(d) Using the normal model from part (c), find the probability that a college student aged 18 to 24 years, selected at random, watches between 20 and 35 hours of television each week.

(e) Using the normal model from part (c), determine the proportion of college students aged 18 to 24 years who watch more than 40 hours of television per week.

Step-by-Step Solution:

Step 1 :

a)

From the plot, we see that the points on the pattern lie close to the straight line and it indicates that the sample data could have come from a population that is normally distributed.

b)

...
 x x - (- 36.1 15.196 230.9184 23.5 2.596 6.739216 7.8 -13.104 171.7148 9.9 -11.004 121.088 22.9 1.996 3.984016 30.5 9.596 92.08322 25.6 4.696 22.05242 20.4 -0.504 0.254016 25.8 4.896 23.97082 9.7 -11.204 125.5296 2.9 -18.004 324.144 16 -4.904 24.04922 33.8
Step 2 of 3

Step 3 of 3

Related chapters

Unlock Textbook Solution