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Published byΚύνθια Κουβέλης Modified over 6 years ago
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Warm Up A 2007 Gallup Poll asked 1008 American adults if they planned to watch the Super Bowl. The pollsters also asked those who planned to watch whether they were more interested in the game or the commercials. Men Women Watch Game Watch Commercials Won’t watch Describe any significant differences or similarities between men and women in this study.
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AP Test Sign-up If you apply for the Free-Reduced Price Meal program through San Jose Unified you qualify for $5 AP tests. You do not have to qualify for free or reduced meals, just apply. Applications can be found at: Applications are due by September 19.
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Displaying Quantitative Data
Quantitative Data – A data set where the measured or observed values for each individual are numeric. Also, calculations with those numeric values make sense (finding average, larger number vs. smaller number, etc.) Types of Displays Dotplot Stemplot Histogram Boxplot Objective: The display of quantitative data should help the reader understand the data set and gain insight into the data set. Displays should be clear, legible and useful for a reader.
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Activity Ping Pong Ball Toss.
Line up behind the tape and toss 5 ping pong balls at the square on the carpet. Count the number of tosses that land inside the square. Write the number of tosses inside the square on the board under “Boys” or “Girls.” (no names)
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Ping Pong Ball Toss Data
Make 2 dotplots using the ping pong ball toss data, one for boys and one for girls. Comment on any similarities and differences in the plots.
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Activity Measure your pulse rate
Find your pulse at your neck and count the number of beats in 30 seconds. Multiply by 2 to get beats per minute. Measure your pulse 3 times and take the average (round to nearest beat). Write your pulse rate on the board under “Boys” or “Girls.” (no names)
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Pulse Rate Data Make 2 stemplots using the pulse rate data, one for boys and one for girls. Comment on any similarities and differences in the plots.
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Analyzing Distributions
When asked to analyze or comment on a distribution, always use SOCS. Shape – a distribution may be “roughly symmetric,” it may be uniform, or it may be skewed Outliers – data points that are far from the other points Center – the “typical” value of the distribution, often the mean or median Spread – range of values covered by the distribution.
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Analyze Pulse Rate Stemplots
Analyze and compare the distributions of pulse rates for boys and girls in the class. Use SOCS for your analysis and remember to compare the distributions.
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Closure 1) Describe a data set that would be better described by a dotplot than a stemplot. 2) Describe a data set better described by a stemplot than a dotplot.
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