UT Knoxville STAT 201 - Practice Exam 1 - FA11 (11 pages)

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Practice Exam 1 - FA11



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Practice Exam 1 - FA11

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Pages:
11
School:
University of Tennessee
Course:
Stat 201 - Introduction to Statistics
Introduction to Statistics Documents

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1 Here are boxplots of the number of calories in 20 brands of beef hot dogs 17 brands of meat hot dogs and 17 brands of poultry hot dogs i 3 Points These boxplots show that circle the best answer a b c d all the poultry hot dog brands have fewer calories than the median for the beef hot dog brands more than half of the poultry hot dog brands have fewer calories than the lower quartile for the beef hot dog brands hot dog type beef meat or poultry is not helpful in predicting calories because some hot dogs of each type are high in calories and some of each type are low in calories none of the poultry hot dog brands have more calories than the median of the beef hot dog brands ii 3 Points What is the median for the beef hot dog brands Circle the best answer a b c d e f 108 145 155 180 191 the median is not displayed in the boxplot iii 4 Points What is approximately the IQR for beef hot dogs Show your work below iv 3 points What is the unit of measure of the IQR you reported above 2 2 3 Points The main advantage of boxplots over stem and leaf plots and histograms is circle the best answer a b c d boxplots make it easy to compare several distributions boxplots show more detail about the shape of the distribution boxplots use the five number summary whereas stem and leaf plots and histograms use the mean and standard deviation boxplots show skewed distributions whereas stem and leaf plots and histograms show only symmetric distributions 3 3 Points The box in any boxplot marks circle the best answer a b c d e the full range covered by the data the range covered by the middle half of the data the range covered by the middle three quarters of the data the span one standard deviation on each side of the mean the span two standard deviations on each side of the mean 4 3 Points You want to make a graph that shows how the cost of one gallon milk has increased since 1980 A good choice for that graph would be a circle the best answer a b c d e bar graph histogram time plot pie



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