nment-take ter teot to search No results I Options A magazine provided overall c
ID: 2936762 • Letter: N
Question
nment-take ter teot to search No results I Options 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 saticfied. The ratings for the four cell-phone services in 20 metropolitan areas are as shown T-Mobile Verizon 81 78 Metropolitan Area ATRT Speint 65 Boston 76 Dallas 71 Detroit lacksonville Las Vegas Los Angeles 74 67 79 Minneapolis 67 Phoenix San Antonio San Diego San Francisco 81 78 82 81 79 74 St. Louis Tampa Washington 81 64 69 00 pe here to searchExplanation / Answer
to calculate these five summary for the data use r software , the code is written as follows :
> tmobile<-c(77,80,76,80,79,83,81,80,74,79,81,77,82,81,78,79,80,80,79,77)
> summary(tmobile)
Min. 1st Qu. Median Mean 3rd Qu. Max.
74.00 77.75 79.50 79.15 80.25 83.00
here
median is = 79.5
smallest value = 74 , first quartile = Q 1 = 77.75 , median = 79.5 , third quartile = Q3 = 80.25
and largest value = 83.
no outlier present in the data .if we plot the boxplot and dot present in the graph then we say that outlier present in the data . here use command
> boxplot(tmobile) and press enter the r software display the graph. and no dot present in the data set. hence we say that no outlier present in the data set.
and all ratings are between smallest value = 74 to largest value = 83 .
for the sprint data set : the r code for these data set is
> sprint<-c(67,65,66,66,68,66,65,69,66,70,67,67,67,66,69,70,68,67,64,69)
> summary(sprint)
Min. 1st Qu. Median Mean 3rd Qu. Max.
64.00 66.00 67.0 67.10 68.25 70.00
> boxplot(sprint)
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