What is the class mark of the Median Class?
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- Is the number of games won by a major league baseball team in a season related to the team batting average? The table below shows the number of games won and the batting average (in thousandths) of 8 teams. Team Games Won Batting Average 1 6060 259259 2 120120 277277 3 8989 263263 4 101101 288288 5 8585 287287 6 109109 270270 7 7777 272272 8 106106 290290 Using games won as the explanatory variable xx, do the following: (a) The correlation coefficient is r=r= . (b) The equation of the least squares line is y^=y^= . SpeakIs the number of games won by a major league baseball team in a season related to the team batting average? The table below shows the number of games won and the batting average (in thousandths) of 8 teams. Team Games Won Batting Average 1 8383 289289 2 116116 290290 3 101101 287287 4 8181 262262 5 110110 288288 6 119119 269269 7 6060 268268 8 6161 280280 Using games won as the explanatory variable xx, do the following: (a) The correlation coefficient is r=r= . (b) The equation of the least squares line is y^=y^=Is the number of games won by a major league baseball team in a season related to the team batting average? The table below shows the number of games won and the batting average (in thousandths) of 8 teams. Team Games Won Batting Average 1 9797 269269 2 9595 275275 3 8686 273273 4 9999 261261 5 6464 285285 6 118118 260260 7 8787 274274 8 8888 280280 Using games won as the explanatory variable ?x, compute the correlation coefficient
- The following data represent the monthly phone use, in minutes, of a customer enrolled in a fraud prevention program for the past 20 months. The phone company decides to use the upper fence as the cutoff point for the number of minutes at which the customer should be contacted. What is the cutoff point? 510398398515357327480491308408483394320338463321374307538409The following data has been collected on the interarrival times of patients to an emergency department: 3.772, 1.761, 0.743, 15.988, 0.412, 7.541, 6.900, 3.447, 7.024, 1.061, 5.449, 0.309, 0.766, 4.807, 8.143, 0.093, 9.524, 0.012, 4.634, and 0.195 minutes. Estimate the squared coefficient of variation of the arrival process. Is the arrival process likely to be Poisson? Why or why not? Estimate the arrival rate?Data collected by a price reporting agency from more than 90,000 gasoline and convenience stores throughout the U.S. showed that the average price for a liter of unleaded gasoline was $0.87. The following data show the price per liter ($) for a sample of 20 gasoline and convenience stores located in San Francisco. 0.97 0.97 1.29 0.92 0.96 0.96 0.98 0.93 1.01 0.96 0.96 0.97 0.96 1.03 1.12 0.95 0.94 1.01 0.93 0.92 (a) Use the sample data to estimate the mean price in dollars for a liter of unleaded gasoline in San Francisco. (Round your answer to three decimal places.) (b) Compute the sample standard deviation in dollars. (Round your answer to three decimal places.) (c) Compare the mean price per liter for the sample data to the national average price. What conclusions can you draw about the cost of living in San Francisco? The average price for a liter of unleaded gasoline in San Francisco is lower than/higher than/same as the national average. This indicates…
- Data collected by a price reporting agency from more than 90,000 gasoline and convenience stores throughout the U.S. showed that the average price for a liter of unleaded gasoline was $0.87. The following data show the price per liter ($) for a sample of 20 gasoline and convenience stores located in San Francisco. 0.97 0.97 1.25 0.92 0.92 1.00 0.94 0.97 1.01 0.96 0.96 0.97 0.92 1.03 1.12 0.95 0.98 0.97 0.97 0.96 (a) Use the sample data to estimate the mean price in dollars for a liter of unleaded gasoline in San Francisco. (Round your answer to three decimal places.) $ (b) Compute the sample standard deviation in dollars. (Round your answer to three decimal places.) $ (c) Compare the mean price per liter for the sample data to the national average price. What conclusions can you draw about the cost of living in San Francisco? The average price for a liter of unleaded gasoline in San Francisco is the national average. This indicates that the cost of living in San…A(n) _______ uses line segments to connect points located directly above class midpoint values.The data below shows car model and the color of vehicles sold at a Car dealership.Hyundai Honda Toyota Daihatsu Subaru TotalRed 2015.40118.648613.518*54.5950Black 1516.9569.511814.8698.6275.0555White 2224.651513.842621.621212.5457.35**Total 57 32 50 29 17 185Chi Sq =1.37 + 0.64 + 4.18 + 0.00 + 0.04 +0.22 + 1.30 + *** + 0.02 + 0.75 +0.28 + 0.10 + 0.89 + 0.02 + 0.75 = 10.47DF = ****, P-Value = *****No cells with expected counts less than 5a) Carefully define the null and alternative hypotheses of the χ2 test underlying the generation of the above table.
- The data below shows car model and the color of vehicles sold at a Car dealership.Hyundai Honda Toyota Daihatsu Subaru TotalRed 2015.40118.648613.518*54.5950Black 1516.9569.511814.8698.6275.0555White 2224.651513.842621.621212.5457.35**Total 57 32 50 29 17 185Chi Sq =1.37 + 0.64 + 4.18 + 0.00 + 0.04 +0.22 + 1.30 + *** + 0.02 + 0.75 +0.28 + 0.10 + 0.89 + 0.02 + 0.75 = 10.47DF = ****, P-Value = *****No cells with expected counts less than 5a) Carefully define the null and alternative hypotheses of the χ2 test underlying thegeneration of the above table.b) Fill in the missing values ‘*’, ‘**’, ‘***’, ‘****’ and ‘*****’.c) What is the conclusion of this test at the 5% level of significance? Give reasons for youranswer.d) Name two limitations of this test.The data below shows car model and the color of vehicles sold at a Car dealership.Hyundai Honda Toyota Daihatsu Subaru TotalRed 2015.40118.648613.518*54.5950Black 1516.9569.511814.8698.6275.0555White 2224.651513.842621.621212.5457.35**Total 57 32 50 29 17 185Chi Sq =1.37 + 0.64 + 4.18 + 0.00 + 0.04 +0.22 + 1.30 + *** + 0.02 + 0.75 +0.28 + 0.10 + 0.89 + 0.02 + 0.75 = 10.47DF = ****, P-Value = *****No cells with expected counts less than 5 b) Fill in the missing values ‘*’, ‘**’, ‘***’, ‘****’ and ‘*****’. c) What is the conclusion of this test at the 5% level of significance? Give reasons for your answer. d) Name two limitations of this testThe following are the drying times (minutes) of 100sheets coated with polyurethane under various ambientconditions:45.6 50.3 55.1 63.0 58.2 65.5 51.1 57.4 60.4 54.956.1 62.1 43.5 63.8 64.9 59.9 63.0 67.7 53.8 57.961.8 52.2 61.2 51.6 58.6 73.8 53.9 64.1 57.2 75.455.9 70.1 46.2 63.6 56.0 48.1 62.2 58.8 50.8 68.151.4 73.9 66.7 42.9 71.0 56.1 60.8 58.6 70.6 62.259.9 47.5 72.5 62.0 56.8 54.3 61.0 66.3 52.6 63.564.3 63.6 53.5 55.1 62.8 63.3 64.7 54.9 54.4 69.664.2 59.3 60.6 57.1 68.3 46.7 73.7 56.8 62.9 58.468.5 68.9 62.1 62.8 74.4 43.8 40.0 64.4 50.8 49.955.8 66.8 67.0 64.8 57.6 68.3 42.5 64.4 48.3 56.5Construct a frequency distribution of these data, usingeight classes.