Do Now: Get your HW out for Ms. Taylor to Stamp (half done = half credit) Complete a frequency table(including cumulative frequency and relative frequency) and create a histogram from the following information: 19, 20, 26, 18, 25, 29, 18, 18, 22, 24, 27

19, 20, 26, 18, 25, 29, 18, 18, 22, 24, 27, 26, 24, 21, 29, 19 D F CF RF

Two-Way Frequency Tables

What is it? Two-way Frequency table: a table listing two categorical variables who values have been paired

https://www.youtube.com/watch?v=aUwpxoaCV-w

Ms. Taylor’s Class Ms. T’s Class Blue Brown Green/ Other Total Boys Girls

Creating a Relative Frequency Table: Jenna asked 40 randomly selected students whether they preferred dogs, cats or other pets. Complete the table for both decimals and percents Preferred Pet Dog Cat Other Total Frequency 18 12 10 40 Relative Frequency Decimals Relative Frequency Percents 18 40 12 40 10 40 40 40 = .45 = .30 = .25 = 1.00 45% 30% 25% 100%

Creating a Two-Way Frequency Table: Jenna also recorded the gender of each student. The results are shown in the two-way frequency table. Find the totals and answer the questions. Preferred Pet Dog Cat Other Total Boys 10 5 9 24 Girls 8 7 1 16 Totals 18 12 10 40 1) How many total students took the survey? 40 2) How many total boys took the survey? 24 18 3) How many students said they like dogs as pets? 10 4) How many boys said they like dogs as pets?

Creating a Two-Way Relative Frequency Table: Preferred Pet Dog Cat Jenna also recorded the gender of each student surveyed, complete the two-way frequency table below. Preferred Pet Dog Cat Other Total Boys 10 5 9 24 Girls 8 7 1 16 Totals 18 12 10 40 Preferred Pet Dog Cat Other Total Boys Girls Totals 10 40 5 40 9 40 24 40 = .25 = .13 = .23 = .60 8 40 7 40 1 40 16 40 = .20 = .175 = .03 = .40 18 40 12 40 10 40 40 40 = .45 = .30 = .25 = 1.0

Creating a Two-Way Relative Frequency Table: Preferred Pet Dog Cat Other Total Boys Girls Totals 10 40 5 40 9 40 24 40 = .25 = .13 = .23 = .60 8 40 7 40 1 40 16 40 = .20 = .18 = .03 = .40 18 40 12 40 10 40 40 40 = .45 = .30 = .25 = 1.0 This is what the final table looks like... Preferred Pet Dog Cat Other Total Boys Girls Totals .25 .13 .23 .60 .20 .18 .03 .40 .45 .30 .25 1

What Pet’s do you like? Preferred Pet None Dog Cat Other Total Boys Girls Totals

Let’s Make a Relative Two-Way Frequency Table Preferred Pet None Dog Cat Other Total Boys Girls Totals

Get with a partner… You and you’re partner will come up with a survey question that has two different parameters (cannot use one from today’s examples) One you have the question, tell Ms. Taylor what is and then survey the entire class.

What are good questions? Good questions have more than one choice. (chocolate vs. vanilla ice cream, boys vs. girls) They do not have vague answers (what is your favorite color)

This is what you have to do… With a partner come up with a question. Survey the entire class (don’t forget Ms. Taylor!) Create a two-way frequency table. Create a relative two-way frequency table. Come up with at least three questions that go along with your data. (like the ones from the video.) Write everything on a colored piece of paper, put both of your names on it and the answers to the questions on the back of the paper. When done, hand it into the basket, pick up the worksheet