For the following population of scores: 11         0          2          9          9          5 Calculate the range and the standard deviation. (Use either definition for the range.) Add 2 points to each score and compute the range and standard deviation again. Describe how adding a constant to each score influences measures of variability.

Find the oefficient of variation for the following data sets. 2. Which data set has more variation? Data set represents the systolic blood pressure for men aged 20-29 and 60-69 20-29 30-30 117 130 122 153 129 141 118 125 131 164 123 139

Test 1, #2. Given the small data sample below, complete the following tasks by hand: 37 42 31 38 43 35 33 40 32 a. Find the standard deviation of the data sample. CE COLLEGE COLLEGE

Alexander Borbely is a professor at the University of Zurich Medical School, where he is director of the sleep laboratory. The histogram in the figure below is based on information from his book Secrets of Sleep. The histogram displays hours of sleep per day for a random sample of 200 subjects. Estimate the mean hours of sleep, standard deviation of hours of sleep and coefficient of variation. (Enter mean to 1 decimal place, s and CV to 2 decimal places.)

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The frequency distribution was obtained using a class width of 0.5 for data on cigarette tax rates. Use the frequency distribution to approximate the population mean and population standard deviation. Compare these results to the actual mean u= $1.885 and standard deviation o = $1.115. E Click the icon to view the frequency distribution for the tax rates. The population mean is S (Round to three decimal places as needed.)

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Which of the following are measures on positions of a data set? the maximum the standard deviation the third quartile a standard score the median

The amount of caffeine in a sample of five-ounce servings of brewed coffee is shown in the histogram. Make a frequency distribution for the data. Then use the table to estimate the sample mean and the sample standard deviation of the data set. Click the icon to view the histogram. Complete the table. Round values to the nearest tenth as needed. Graph/chart f Midpoint x xf 70.5 Ay 30- 92.5 26 25- 114.5 136.5 20- 158.5 15- 12 Ef = Exf = 10- Find the mean of the data set. 5- X = (Round to the nearest tenth as needed.) 48.5 70.5 92.5 114.5 136.5 158.5 Complete the table. Round values to the nearest tenth as needed. Midpoint x (x-x)? (x-x)?f X-X 70.5 Print Done 92.5 114.5 136.5 158.5 (x-x)?r= ] of

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