test 1 practice - 1. Identify the type of variable as...

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1. Identify the type of variable as categorical or quantitative in all 4 situations below. Favorite soft drink of college students; Speed of a moving car at specified moments in time; The model of cars in the student parking lots; The height of your classmates a. Categorical; categorical; quantitative; quantitative b. Categorical; quantitative; quantitative; categorical c. Quantitative; categorical; quantitative; categorical d. Categorical; quantitative; categorical; quantitative QUESTIONS 2-4: Data on the amount of time (rounded to the nearest second) that 31 randomly selected customers spent in line before being served at a branch of a local bank are displayed in the following histogram. 2. What word best describes the shape of the histogram for the length of time spent in line. a. Right skewed b. Left skewed c. Approximately symmetric d. None of the above 3. Approximately what percentage of the customers spent less than 200 seconds in line? a. 67.7% b. 32.3% c. 50.2% d. 62.5%
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4. Based on this histogram, what is the maximum length of time spent in line by one individual customer? a. 2 b. 50 c. 350 d. Unable to determine 5. If data are right skewed, the typical response and measure of variability are best described, respectively, by the statistics: a. Mean and standard deviation b. Median and IQR c. Mode and range d. Mean and IQR e. Median and standard deviation 6. A standard normal distribution has:
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This note was uploaded on 06/05/2011 for the course STAT 3000 taught by Professor Staff during the Spring '08 term at University of Georgia Athens.

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test 1 practice - 1. Identify the type of variable as...

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