1. Problems of the Day 1.Number of cars that exceeded the speed limit on Guangzhou avenue during the first 16 days of a October are listed below. Make a box-and-whisker plot of this data. 15, 25, 16, 10, 10, 20, 15, 16, 26, 30, 13, 25, 18, 10, 10, 35 2.Use the box-and-whisker plot from Question 1 to make a conclusion about the data.

2. Frequency Tables We can use a frequency table to help ____________ and ______________ data. A frequency table is used to ________ data values into ___________. The ____________ of an interval is the number of values that are in the interval. organize group frequency interpret intervals

3. Making a Frequency Table Given data set of 34 numbers: 7, 5, 4, 10, 5, 7, 2, 6, 8, 1, 5, 1, 3, 1, 12, 11, 2, 11, 2, 5, 0, 6, 14, 8, 3, 1, 15, 10, 0, 2, 0, 15, 9, 1. Step 1: Choose intervals of ____________ size that cover all the data values (here they range from 0 to 15 and each interval covers 4 whole numbers ) Step 2: Make a _________ mark next to the interval containing a given number in the data set. Step 3: Write the frequency for each interval by _________ the number of tally marks for the interval. equal tally totaling

4. Histograms A Histogram is a graph that displays data from a ____________ table. A histogram has _________ bar for each interval that contains data values. The length of the bar indicates the _____________ for the interval. one frequency

5. Making a Histogram After making a Frequency Table from the data: Step 1: Draw and label the _________ and ________ axes. List each interval from the frequency table on the __________ axis, and choose appropriate scale for the frequency on the ______axis, starting at 0. horizontalvertical horizontal vertical

6. Making a Histogram Step 2: Draw a bar for each _____________. The bars should have the _____ width. The length of each bar equals the __________ for that interval. interval same frequency

7. Interpreting a Histogram A histogram can be used to compare a data set that is arranged in _________________. The histogram shows the butterflies spotted in a butterfly garden between 8 A.M. and 8 P.M. groups (intervals) What can you conclude about the data from the histogram?

8. Guided Practice 1.The numbers of words that students in a typing class can type in a minute are listed. Make a frequency table and histogram of the given data:25, 19, 23, 29, 34, 26, 30, 40, 33, 20, 35, 35, 25, 29, 36, 22, 31 Remember to follow the steps and start by choosing intervals for the frequency table. 1.From the Histogram you made in above problem, make at least 3 conclusions about the numbers of words the students in this typing class can type in a minute.