1. Warm Up 1.The sum of the values in a data set divided by the number of data values gives the ________________________. 2.Find the mean, median, mode, and range of the data set: 5, 3, 7, 6, 2, 4, 5, 8 3.Find the mean, median, mode, and range of the data set: 12, 15, 20, 16, 14, 13

2. Lesson 62, Displaying Data in Stem and Leaf Plots and Histograms Statistics and Probability

3. Stem and Leaf Plots  Stem and leaf plot : a data display, uses some digits as “stems” and others as “leaves”  The stems have a greater place value than the leaves.  The last digit is always the leaf. Other digits are the stem.  Stem and leaf plots help us organize and display data to show the distribution  Relative frequency : the number of times an event happens divided by the total number of trials in an experiment

4. Histograms  Histogram : a bar graph that displays the frequency of data in equal intervals  Histograms show the distribution of data  Each bar must be the same width  Each bar should touch the bar next to it

5. Example  The amount of money raised for a charity event by the homerooms at Jefferson High School are shown below. Create a stem and leaf plot of the data. $150, $125, $134, $129, $106, $157, $108, $135, $144, $149

6. Example  Use the stem and leaf plot to find the median, mode, range, and relative frequency of 41. Stem Leaves Service Club Ages of Members 2345623456 5, 6 0, 2, 3, 4, 4, 4, 8, 9 1, 1, 2, 6, 7 2, 5, 7 0, 4

7. Example  The list shows the low temperatures in degrees Fahrenheit in New Orleans for the first 15 days of April 2007. Create a stem and leaf plot of the data and use it to create a histogram of the data. 65, 70, 69, 61, 56, 52, 43, 42, 51, 60, 63, 52, 60, 54, 50

8. Homework Questions

10. Correcting Homework  Be kind.  If the paper in front of you has no work shown, return it to its owner.  If the paper in front of you is not in pencil or black ink, return it to its owner.  If the paper in front of you is not complete, return it to its owner.  Remember you are filling out the score sheet for the person that you are correcting.  Be sure to write “C.B. ____________” with your name on the paper you graded and on the score sheet.

11. Homework  1 st and 2 nd hour: Lesson 62 #1-4, 8, 10-11, 15-16, 18-19, 21-23, 25-26, Practice a-d  3 rd hour: Lesson 62 #1-4, 10-11, 16, 18-19, 23-24, Practice a-d