12 Chapter Review

Connecting BIG Ideas and Answering the Essential Questions

1. Data Collection and Analysis When you collect data, you should use a sampling technique free of bias. You can use standard measures to describe data sets and make estimates, decisions, or predictions.	Data Analysis (Lessons 12-3 and 12-4) 11 12 14 16 11 10 13 7 Mean: 11.75 Median: 11.5 Mode: 11 Range: 9 Samples and Surveys (Lesson 12-5) Data Types: qualitative, quantitative, univariate, bivariate Sample Types: random, systematic, stratified
2. Data Representation You can use matrices, frequency tables, histograms, box-and-whisker plots, tree diagrams, and other representations to describe different types of data sets.	Data Displays (Lessons 12-1, 12-2, 12-4, and 12-6)
3. Probability You can find theoretical and experimental probabilities to make decisions or predictions about future events.	Theoretical and Experimental Probability (Lesson 12-7) Theoretical : number of favorable outcomes number of possible outcomes Experimental : number of times event occurs number of times experiment is done table with 2 rows and 1 column , row1 column 1 , cap theoretical . colon . fraction numberoffavorableoutcomes , over numberofpossibleoutcomes end fraction , row2 column 1 , cap experimental . colon . fraction numberoftimeseventoccurs , over numberoftimesexperimentisdone end fraction , end table	Probability of Compound Events (Lesson 12-8) Independent: P ( A  and  B ) = P ( A ) · P ( B ) p open eh , and b close equals p open eh close middle dot p open b close Dependent: P ( A then B ) = P ( A ) · P ( B after A ) p open eh , then b close equals p open eh close middle dot p open b , after eh close

Choose the correct term to complete each sentence.

1. Each numerical item of data in a matrix is called a(n) ¯ ? modified macron with question mark above .
2. The number of data values in an interval is the ¯ ? modified macron with question mark above  of the interval.
3. A(n) ¯ ? modified macron with question mark above  is a data value much greater or less than the other values in a data set.
4. The median of the lower half of an ordered data set is the first ¯ ? modified macron with question mark above .

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