Opener 1.Determine the mean number of hours spent watching TV each weekend from the results of the randomly selected survey. 2.What is the minimum number of hours spent watching TV each weekend? 3.What is the maximum number of hours spent watching TV each weekend? 4.Determine the median of the data set. 5.How does the mean compare to the median? Survey Number Hours Spent Watching TV (per weekend)

Opener-Answers Survey Number Hours Spent Watching TV (per weekend)

Opener-Answers 2.What is the minimum number of hours spent watching TV each weekend? The minimum number of hours spent watching TV each weekend is 3 hours. Survey Number Hours Spent Watching TV (per weekend)

Opener-Answers 3.What is the maximum number of hours spent watching TV each weekend? The maximum number of hours spent watching TV each weekend is 15 hours. Survey Number Hours Spent Watching TV (per weekend)

Opener-Answers Survey Number Hours Spent Watching TV (per weekend)

Opener-Answers 5.How does the mean compare to the median? They are fairly close. The mean is approximately 7.4 and the median is 7. Survey Number Hours Spent Watching TV (per weekend)

Ch Day 1 of 2 Using Samples, Centers, and Spreads to Describe Data Page 732

Page 732 Read for me please… Work on #1 in your groups…3 minutes Read the box on the bottom of page 732 for me please… Page 733 Look at the table Maria made. 2. How did Maria determine the mean number of minutes the students spent studying? Maria determined the mean by adding up all the minutes the eight students spent studying each week. Then she divided this amount by eight to determine the mean.

Page 733 Sample #Student #Min. Spent Studying Mean Number of Min. Studying per week Absolute Deviation of Min. per week – 110 = -50ǀ-50ǀ = 50 *Work on #3 in your groups, using the table on page 750. Complete the tables on page (tables 2-5)…7 minutes (skip #4-6). 120 – 110 = – 110 = – 110 = – 110 = – 110 = – 110 = 90 ǀ10ǀ = 10 ǀ-60ǀ = 60 ǀ40ǀ = 40 ǀ-60ǀ = 60 ǀ-10ǀ = 10 ǀ90ǀ = 90

Page 734 Sample #Student #Min. Spent Studying Mean Number of Min. Studying per week Absolute Deviation of Min. per week – 120 = 80ǀ80ǀ = 80 *Work on #3 in your groups, using the table on page 750. Complete the tables on page (tables 2-5)…7 minutes (skip #4-6).

Page 735 Sample #Student #Min. Spent Studying Mean Number of Min. Studying per week Absolute Deviation of Min. per week *Work on #3 in your groups, using the table on page 750. Complete the tables on page (tables 2-5)…7 minutes (skip #4-6).

Page 735 Sample #Student #Min. Spent Studying Mean Number of Min. Studying per week Absolute Deviation of Min. per week *Work on #3 in your groups, using the table on page 750. Complete the tables on page (tables 2-5)…7 minutes (skip #4-6).

Page 736 Sample #Student #Min. Spent Studying Mean Number of Min. Studying per week Absolute Deviation of Min. per week *Work on #3 in your groups, using the table on page 750. Complete the tables on page (tables 2-5)…7 minutes (skip #4-6).

Page 737 Read for me please… Skip #7 & 8 9. Plot the mean absolute deviations on a number line x x x x x 10. Describe the range of the mean absolute deviations. The range of the mean absolute deviations is between 35 and If you calculated the mean absolute deviation for the entire class, do you think that this would be less than, greater or equal to the mean? The mean deviation for the entire class would be greater than the mean absolute deviations of the samples. Read for me please… Work on your homework in your groups until the bell rings

End of Day 1!

Opener 1. Describe the relationship between a population and a sample. A population includes every member of a particular group. A sample is a selected part of the population. 2. What do you think it means to say that a sample must be representative of the population? A sample being representative of the population means the sample must have similar characteristics to the population. 3. What is the purpose of a statistic? The purpose of a statistic is to make a prediction, or draw a conclusion about the parameter of the population.

Ch – p. 738 Day 2 of 2! Page 738 Read for me please (Problem 2)… Page 739 Read for me please… 1. SampleMinQ1MedianQ3MaxIQR = Finish the table in your groups…3 minutes = = = =60

Skip page 741, 742, and 743 Page 744 Read for me please… 1.Construct a box and whisker plot for the second sample you conducted *Plot your minimum and maximum numbers (60 and 200). *Connect the points to make a small number line above the larger number line. *Plot your median (110). *Plot Q1 and Q3 (90 and 150). *Connect the points to make your box.

Skip page 745 and 746 Work on #2 on page 747 and #3 on page 748 until the end of class. If you should finish work on your homework.