Glendale is one of the many five-star hotels in the country. The management has a policy that the customers’ waiting time at the checkout counter should not be more than 10 minutes. In a study the management recorded the waiting times for 60 customers. The customers were selected using a systematic random sampling process. The data were analysed using SPSS. Some of the output from the analysis are shown in figure 1.State the 95% confidence interval for the mean waiting time for all the customers at the checkout counter and interpret what this interval means.Test if the mean waiting time is more than 10 minutes. Figure 1StatisticStd. ErrorMean14.5.3795% ConfidenceLower Bound13.8Interval for MeanUpper Bound15.35% Trimmed Mean14.5Median14.0Variance8.3TimeStd. Deviation2.8Minimum8.0Мaximum22.0Range14.0Interquartile Range4.5Skewness.153.309

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Glendale is one of the many five-star hotels in the country. The management has a policy that the customers’ waiting time at the checkout counter should not be more than 10 minutes. In a study the management recorded the waiting times for 60 customers. The customers were selected using a systematic random sampling process. The data were analysed using SPSS. Some of the output from the analysis are shown in figure 1.

State the 95% confidence interval for the mean waiting time for all the customers at the checkout counter and interpret what this interval means.
Test if the mean waiting time is more than 10 minutes.

Figure 1
Statistic
Std. Error
Mean
14.5
.37
95% Confidence
Lower Bound
13.8
Interval for Mean
Upper Bound
15.3
5% Trimmed Mean
14.5
Median
14.0
Variance
8.3
Time
Std. Deviation
2.8
Minimum
8.0
Мaximum
22.0
Range
14.0
Interquartile Range
4.5
Skewness
.153
.309

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