Packed in at Rush Hour! Sq. Ft. per standing passenger Morning Morning Afternoon Afterne 1988 1.5 1.8 1.9 1.9 In 1990 the New York Times reported the average number of square feet per standing passenger in 1987 and 1988 for 19 subway 1987 2.4 2.7 2.9 3 3.1 3.6 3.6 3.6 3.7 3.8 6.7 1988 2.5 2.7 2.7 2.9 3.1 3.2 3.3 3.5 3.5 3.7 4.3 1987 stops. Although the sampling method was not reported, we will presume that these data represent a random sample of days during the morning and evening rush hours. The NYC Transit Authority managers 1.8 1.9 2.2 attempted to improve the space problem on subway cars (more space is 2.2 better-trust us!) by adding cars to trains during the rush hours. They gathered the 1988 data to check on their efforts after one year. The data 2.4 2.3 2.1 2.1 2.1 2.2 2.2 2.8 are in the given table. 2.4 2.4 2.5 2.5 of day, they will report how far away the target value of 3 feet is relative The MTA guidelines in 1987 specified a minimum of 3 square feet per standing passenger. The engineers would like to report standardized measures (z-scores) of this target value. That is, for each year and time 2.9 Hictributions
Packed in at Rush Hour! Sq. Ft. per standing passenger Morning Morning Afternoon Afterne 1988 1.5 1.8 1.9 1.9 In 1990 the New York Times reported the average number of square feet per standing passenger in 1987 and 1988 for 19 subway 1987 2.4 2.7 2.9 3 3.1 3.6 3.6 3.6 3.7 3.8 6.7 1988 2.5 2.7 2.7 2.9 3.1 3.2 3.3 3.5 3.5 3.7 4.3 1987 stops. Although the sampling method was not reported, we will presume that these data represent a random sample of days during the morning and evening rush hours. The NYC Transit Authority managers 1.8 1.9 2.2 attempted to improve the space problem on subway cars (more space is 2.2 better-trust us!) by adding cars to trains during the rush hours. They gathered the 1988 data to check on their efforts after one year. The data 2.4 2.3 2.1 2.1 2.1 2.2 2.2 2.8 are in the given table. 2.4 2.4 2.5 2.5 of day, they will report how far away the target value of 3 feet is relative The MTA guidelines in 1987 specified a minimum of 3 square feet per standing passenger. The engineers would like to report standardized measures (z-scores) of this target value. That is, for each year and time 2.9 Hictributions
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.4: Collecting Data
Problem 7E
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