x 3.EOC.66-E Question Help As a measure of productivity, a cell phone carrier records the number of customers each of its retail employees activates weekly. An activation is defined as either a new customer signing a cell phone contract or an existing customer renewing a contract. The accompanying table shows the number of weekly activations for eight randomly selected employees along with their job-satisfaction levels rated on a scale of 1-10 (10 = most satisfied). Complete parts a through c. Click the icon to view the data. a. Calculate the sample covariance. Sx,y = 4.987 (Type an integer or decimal rounded to three decimal places as needed.) b. Calculate the sample correlation coefficient. xy = 0 (Type an integer or decimal rounded to three decimal places as needed.)Score: 0 Of 1 pt { 7 of 14 (14 complete)V D it) 3.EOC.67-E The accompanying table lists customer satisfaction scores for the major mass-market car manufacturers for the U.S. Complete parts a through d below. Click the icon to view the table. a. Determine the coefficient of variation. Coefcient of variation , (Round to two decimal places as needed.) b. Calculate the zscore for a company with a score of 900. zscore - (Round to two decimal places as needed.) c. Test to determine if the empirical rule holds true by determining the percentage of observations that fall within 1 one standard deviation from the mean. What is the percentage of observations that fall within 1 one standard deviation from the mean? % of the observations fall within :t one standard deviation from the mean. (Round to the nearest whole number as needed.) Choose the correct answer below. ( A. The empirical rule does hold true because the percentage of values that fall within the interval is close to the 68% predicted by the empirical rule. B. The empirical rule does hold true because the percentage of values that fall within the interval is not close to the 68% predicted by the empirical rule. 'C. The empirical rule does not hold true because the percentage of values that fall within the interval is not close to the 68% predicted by the empirical rule. D. The empirical rule does not hold true because the percentage of values that fall within the interval is close to the 68% predicted by the empirical rule. d. Verify that Chebyshev's Theorem holds true by determining the percentage of observations that fall within 1: two standard deviations from the mean. What is the percentage of observations that fall within 1 two standard deviations from the mean? a of the observations fall within :l: two standard deviations from the mean. (Round tn the nearest whole number as needed) 9 3.EOC.67-E The accompanying table lists customer satisfaction scores for the major mass-market car manufacturers for the US. Complete parts a through d below. :12 Click the icon to view the table. What is the percentage of observations that fall within :l: one standard deviation from the mean? a % of the observations fall within 1 one standard deviation from the mean. (Round to the nearest whole number as needed.) Choose the correct answer below. 'A. The empirical rule does hold true because the percentage of values that fall within the interval is close to the 68% predicted by the empirical rule. 2. The empirical rule does hold true because the percentage of values that fall within the interval is not close to the 68% predicted by the empirical rule. . The empirical rule does not hold true because the percentage of values that fall within the interval is not close to the 68% predicted by the empirical rule. D. The empirical rule does not hold tme because the percentage of values that fall within the interval is close to the 68% predicted by the empirical rule. d. Verify that Chebyshev's Theorem holds true by determining the percentage of observations that fall within 1: two standard deviations from the mean. What is the percentage of observations that fall within :l: two standard deviations from the mean? '% of the observations fall within 1 two standard deviations from the mean. (Round to the nearest whole number as needed.) Choose the correct answer below. A. Chebyshev's Theorem does hold true because the percentage of values that fall within the interval is at least the 75% predicted by Chebyshev's Theorem. B. Chebyshev's Theorem does not hold true because the percentage of values that fall within the interval is at least the 75% predicted by Chebyshev's Theorem. . Chebyshev's Theorem does not hold true because the percentage of values that fall within the interval is not at least the 75% predicted by Chebyshev's Theorem. D. Chebyshev's Theorem does hold true because the percentage of values that fall within the interval is not at least the 75% predicted by Chebyshev's Theorem. i Data Table X Company Customer Satisfaction Mazda 784 Toyota 815 Kia 818 Fiat 739 Dodge 771 Honda 797 Buick 860 Subaru 818 Ram 755 Nissan 822 MINI 850 Chrysler 785 Hyundai 812 Ford 796 Chevrolet 829 Mitsubishi 793 Jeep 753 GMC 837 Print Done 3HE0069-E Question HelpV \"- The accompanying table shows the frequency distribution for the mileage on a sample of a certain rental company's rental cars If appropriate, use midpoints of ranges in nding approximate values Complete parts a and b a Click the icon to view the frequency distribution for the mileage on the sample of cars. a. Calculate the approximate average mileage per car for the sample The approximate average mileage for the sample is 5,776' . (Round to the nearest integer as needed.) I). Calculate the approximate variance and standard deviation for the sample. The approximate variance for the sample is (Round to the nearest integer as needed.) @ 3HEOC79-E Question Help V a Suppose Consumer Reports would like to investigate the relationship between the battery life, in hours, and the screen size, in diagonal inches, of a laptop computer. The following table shows a random sample of eight laptops and the battery life, in hours, and corresponding screen size, in inches, of each, Complete parts a through c. a Click the icon to view the data. a. Calculate the sample covariance. s,\" = 0.256 (Type an integer or decimal rounded to three decimal places as needed.) b. Calculate the sample correlation coefcient. rxy= (Type an integer or decimal rounded to three decimal places as needed.) X 3.EOC.68-E Question Help The accompanying table shows the frequency distribution for the golf scores recorded during a certain golf tournament. If appropriate, use midpoints of ranges in finding approximate values. Complete parts a and b. Click the icon to view the frequency distribution for the golf scores. a. Calculate the approximate average golf score for the tournament. The approximate average golf score for the tournament is (Round to one decimal place as needed.) b. Calculate the approximate variance and standard deviation for the tournament. The approximate variance for the tournament is (Round to two decimal places as needed.) The approximate standard deviation for the tournament is (Round to two decimal places as needed.)i Golf Score Frequency Distribution -X Score Frequency 269-277 3 278-286 13 287-295 18 296-304 12 305-313 4 314-322 3 Print Done