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Q: The coefficient of variation CV describes the standard deviation as a percent of the mean. Because…
A:
Q: Calculate the sample standard deviation for this data set: 88, 73, 91.
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Q: The coefficient of variation CV describes the standard deviation as a percent of the mean. Because…
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Q: The table on the right gives the annual income for eight families, in thousands of dollars. Find…
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Q: The table on the right gives the annual income for eight families, in thousands of dollars. Find the…
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Q: The coefficient of variation CV describes the standard deviation as a percent of the mean. Because…
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Q: The coefficient of variation CV describes the standard deviation as a percent of the mean. Because…
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Q: The coefficient of variation CV describes the standard deviation as a percent of the mean. Because…
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Use the table to find the value that is three standard deviations above and below the mean. (Enter exact numbers as integers, fractions, or decimals.)
Baseball Player | Batting Average | Team Batting Average | Team Standard Deviation |
---|---|---|---|
Fredo | 0.158 | 0.186 | 0.012 |
Karl | 0.177 | 0.199 | 0.015 |
(b) below the mean
Fredo's Team | |
Karl's Team |
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- Use the magnitudes (Richter scale) of the 120 earthquakes listed in the accompanying data table. Use technology to find the range, variance, and standard deviation. If another value, 8.00, is added to those listed in the data set, do the measures of variation change much? Click the icon to view the table of magnitudes. Magnitudes Without the extra data value, the range is (Type an integer or decimal rounded to three decimal places as needed.) 3.28 2.82 2.83 1.96 1.70 2.55 O 2.45 3.40 3.95 1.59 2.91 1.63 2.53 2.42 2.97 2.93 3.99 2.54 2.43 1.83 2.17 2.35 2.00 3.01 2.80 3.86 2.93 2.08 1.86 2.35 2.38 3.45 3.43 1.55 2.54 1.49 2.19 3.09 2.28 3.25 1.98 1.91 2.42 2.95 2.14 2.33 2.56 2.89 1.48 1.91 2.68 1.81 3.65 2.70 1.45 3.61 3.14 2.57 1.51 1.41 2.83 2.87 2.18 1.67 3.21 1.39 1.75 2.35 1.14 2.36 2.48 1.79 2.00 3.03 1.94 2.42 1.86 2.25 2.33 3.17 4.01 2.08 1.49 2.31 2.33 2.56 2.59 2.21 2.75 2.45 2.73 3.58 2.81 2.80 3.25 1.76 4.68 3.23 2.38 2.00 3.83 2.39 2.85 3.38 2.69 2.31 2.83 2.78 2.43 2.34…The distribution of the number of hours that a random sample of people spend doing chores per week is shown in the pie chart. Use 32 as the midpoint for "30+ hours." 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 pie chart. First construct the frequency distribution. Class Frequency, f 0-4 5-9 10-14 15-19 20-24 25-29 30+ Find an approximation for the sample mean. X= (Type an integer or decimal rounded to the nearest tenth as needed.) Find an approximation for the sample standard deviation. S= (Type an integer or decimal rounded to the nearest tenth as needed.) Weekly Chore Hours 0-4 hours (3 people) 5-9 hours (14 people) 10-14 hours (21 people) 15-19 hours (18 people) 20-24 hours (17 people) 25-29 hours (11 people) 30+ hours (7 people) - X -Player His Average Points Other's Average Points Other's Standard Deviation Fredo 153 163 15 Karl 163 183 35 Table 2.57 a. Which player had the higher average points when compared to the other players on his team? Fredo O Karl b. Use Table 2.57 to find the value that is three standard deviations above the mean for each team. Enter the exact answers. Fredo's team: Number Karl's team: Number C. Use Table 2.57 to find the value that is three standard deviations below the mean for each team. Enter the exact answers. Fredo's team: Number Karl's team: Number Next Back Question Menu- Quit & Save Submit Assignment 502 PM 200
- The coefficient of variation CV describes the standard deviation as a percent of the mean. Because it has no units, you can use the coefficient of variation to compare data with different units. Find the coefficient of variation for each sample data set. What can you conclude? Standard deviation CV = • 100% Mean E Click the icon to view the data sets. Data Table ..... CVneights = 71.2% (Round to the nearest tenth as needed.) Heights Weights 68 181 77 169 72 167 72 207 71 177 70 175 78 185 69 186 67 221 70 216 67 209 73 206The 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 μ = $1.638 and standard deviation o = $1.052. Click the icon to view the frequency distribution for the tax rates. The population mean is $ (Round to three decimal places as needed.) book Get more help. C *** Frequency distribution of cigarette tax rates G Search or type URL Tax Rate 0.00-0.49 0.50-0.99 1.00-1.49 1.50-1.99 2.00-2.49 2.50-2.99 3.00-3.49 3.50-3.99 4.00-4.49 Print Frequency O 7 12 6 6 6 6 3 3 1 Done - X Clear all Check answer← The numbers of regular season wins for 10 football teams in a given season are given below. Determine the range, mean, variance, and standard deviation of the population data set. 2, 10, 15, 4, 12, 9, 13, 10, 5, 7 The range is 13. (Simplify your answer.) The population mean is 8.7. (Simplify your answer. Round to the nearest tenth as needed.) The population variance is 15.6. (Simplify your answer. Round to the nearest tenth as needed.) The population standard deviation is (Simplify your answer. Round to the nearest tenth as needed.)
- The distribution of the number of hours that a random sample of people spend doing chores per week is shown in the pie chart. Use 32 as the midpoint for "30+ hours." 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 pie chart. First construct the frequency distribution. Weekly study hours Class Frequency, f 0-4 5-9 0-4 hours (3 people) 10-14 5-9 hours (14 people) 10-14 hours (19 people) 15-19 15-19 hours (21 people) 20-24 20-24 hours (14 people) O 25-29 hours (13 people) 25-29 30+ hours (4 people) 30+ Print DoneThe ages (in years) of a random sample of shoppers at a gaming store are shown. Determine the range, mean, variance, and standard deviation of the sample data set. 1212, 1818, 2323, 1414, 1515, 1818, 1919, 1616, 1313, 1616 The range is 1111. (Simplify your answer.) The mean is 16.416.4. (Simplify your answer. Round to the nearest tenth as needed.) The variance is nothing. (Simplify your answer. Round to the nearest hundredth as needed.) The standard deviation is nothing. (Simplify your answer. Round to the nearest tenth as needed.)Find the mean and standard deviation for the individualized instruction scores. Scores Individualized Instruction 50 - 59 4 60 – 69 8 70 - 79 6 80 - 89 8 90 - 99 3 Mean = (Round to the nearest hundredth.)
- Gabriel and Lucia took a road trip across the country. The room costs, in dollars, for their overnight stays are listed in the accompanying table. How many of the cost amounts are within one standard deviation of the mean? Click the icon to view the room costs in dollars. There are cost amounts within one standard deviation of the mean. (Type a whole number.) Room Costs ($) 70 100 140 185 195 200 215 220 225 290 310 315 D -The coefficient of variation CV describes the standard deviation as a percent of the mean. Because it has no units, you can use the coefficient of variation to compare data with different units. Find the coefficient of variation for each sample data set. What can you conclude? Standard deviation CV 100% Mean Data Table A Click the icon view the data sets. CVneights = % (Round to the nearest tenth as needed.) Heights Weights CVweights = % (Round to the nearest tenth as needed. 69 188 65 177 What can you conclude? 74 210 76 208 O A. Weight is more variable than height. 80 173 O B. Height is more variable than weight. 67 203 76 170 66 225 70 218 65 204 72 183 74 209
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