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TWO WAY TABLES

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SP.4 Understand that patterns of association can also be seen in bivariate categorical data by displaying frequencies and relative frequencies in a two-way table. Construct and interpret a two-way table summarizing data on two categorical variables collected from the same subjects. Use relative frequencies calculated for rows or columns to describe possible association between the two variables. Standard 8.SP.4

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: A relative frequency is the fraction or proportion of times an answer occurs. To find the relative frequencies, divide each frequency by the total number of students in the sample -.relative frequency

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You need to make a table to show the comparisons: you are comparing those who like chocolate and those who like caramel. You will also include those who don’t

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How do you organize data of students with cell phones that also have MP3 players? Opening : Constructing Two-Way Table

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Let’s Review A two-way table shows data that pertain t o two different categories. Cell Phone No Cell Phone Total MP3 Player Have cell phone and mp3 player Have mp3 player only Total with MP3 player No MP3 Player Have cell phone, but no mp3 player Have no cell phone or mp3 player Total with no MP3 player Total Total with cell phone Total with no cell phone Total Sampled Opening : Constructing Two-Way Table

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Let’s Review Core Lesson Cell PhoneNo Cell PhoneTotal MP3 Player No MP3 Player Total A survey of 8 th graders at a middle school found that 73 students own a cell phone and 60 of those students also own an MP3 player. There are 9 students that do not own a cell phone, but own an MP3 player. Eight students do not own either device Opening : Constructing Two-Way Table

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Let’s Review Core Lesson Cell Phone No Cell Phone Total MP3 Player =69 No MP3 Player8 Total73 Opening : Constructing Two-Way Table

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Let’s Review Core Lesson Cell Phone No Cell Phone Total MP3 Player No MP3 Player =13 8 Total73 Opening : Constructing Two-Way Table

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Let’s Review Core Lesson Cell Phone No Cell Phone Total MP3 Player No MP3 Player =21 Total73 Opening : Constructing Two-Way Table

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Let’s Review Core Lesson Cell Phone No Cell Phone Total MP3 Player No MP3 Player Total739+8=17 Opening : Constructing Two-Way Table

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Let’s Review Core Lesson Cell Phone No Cell Phone Total MP3 Player No MP3 Player Total = 73+17= 90 Opening : Constructing Two-Way Table

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Let’s Review Guided Practice A survey was conducted to see if students get an allowance and if they have to do household chores. Of the 12 students that receive no allowance, 5 of them have no chores. There are 17 students who do chores and receive an allowance, while 6 students get an allowance without doing any chores. Construct a two way table to display this data. Opening : Constructing Two-Way Table Your Turn…

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Let’s Review Core Lesson Cell Phone No Cell Phone Total MP3 Player No MP3 Player Total Opening : Constructing Two-Way Table

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