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Many Families in California are using backyard structures for home offices, art studiosr and hobby areas as well as for additional storage. Suppose that the mean price for a customized wooden, shingled backyard structure is $3100. Assume that the standard deviation is $1100. a. What is the Zescore for a backyard structure costing $2200 (to 2 decimals)? If your answer is negative, enter minus (,) sign. _ ",0 Mi 9 b. What is the zascore for a backyard structure costing $4700 (to 2 decimals)? - 1.42 :l 0 c. Interpret the Zascores in parts (a) and (b). Comment on whether either should be considered an outlier. $2200 is l 0.67:l 0 standard deviations @ the mean. $4700 Is ii 1.64} 0 standard deviations 9 the mean. d. If the cost for a backyard shedaofce combination built in Albany, California, is $13, 000, should this structure be considered an outlier? Explain. $13,000 ls l 9 l 9 (to 2 decimals) standard deviations above v 9 the mean. This cost @ an outlier. A magazine provided overall customer satisfaction scores for AT&T, Sprint, T-Mobile, and Verizon cell-phone services in major metropolitan areas throughout the United States. The rating for each service reflects the overall customer satisfaction considering a variety of factors such as cost, connectivity problems, dropped calls, static interference, and customer support. A satisfaction scale from 0 to 100 was used with 0 indicating completely dissatisfied and 100 indicating completely satisfied. The ratings for the four cell-phone services in 20 metropolitan areas are as shown. Metropolitan Area AT&T Sprint T-Mobile Verizon Atlanta 70 67 75 80 69 65 78 77 Boston Chicago 71 66 74 78 Dallas 75 66 78 79 Denver 71 68 77 78 66 80 Detroit 73 81 Jacksonville 73 65 79 82 Las Vegas 72 69 78 82 Los Angeles 66 66 72 79 Miami 68 70 77 81 Minneapolis 68 67 79 78 79 Philadelphia N 67 75 67 82 Phoenix 68 80 San Antonio 75 99 79 81 San Diego 69 69 76 80 San Francisco 66 70 77 76 Seattle 68 68 78 78 74 67 78 80 St. Louis Tampa 73 64 77 80 72 69 75 77 Washingtonc. Are there outliers for T-Mobile? Explain. All ratings are between and No, the data do not contain outliers v d. Repeat parts (b) and (c) for the other three cell-phone services. AT&T Sprint Verizon Smallest value 65 66 72 First quartile (to 2 decimals) 66 68 75.25 Median (to 1 decimal) 67 70.5 78 Third quartile (to 2 decimals) 68.5 73 78.5 Largest value 70 X 75 X 81 Are there outliers for AT&T? Explain. Limits for AT&T(to 1 decimal) and X No, the data do not contain outliers v Are there outliers for Sprint? Explain. Limits for Sprint(to 2 decimals) and X No, the data do not contain outliers Are there outliers for Verizon? Explain. Limits for Verizon(to 2 decimals) and XFartune magazine's list of the world's most admired companies for 2014 is provided the data contained in the DATAle named AdmiredCompanies (Fortune, March 17, 2014). The data in the column labeled Return shows the one-year total return (95) for the top-ranked 50 companies. For the same time period the S&P average return was 13. 4%. Click an the datafile logo to reference the data. 3. Compute the median return for the toperanked 50 companies (to 1 decimal). l 131 b. What percentage of the toprranked 50 companies had a Ol'IE/Eal' return greater than the S&P average return? i l 0 % 1:. Develop the ve-number summary for the data. If required, round your answers to two decimals places. If required, enter negative values as negative numbers. til Return Minimum l_13_9_l 9 First Quartile l 3.3} 9 Median l 195 0 Third Quartile l 30 l Maximum l 117.1l
