To decide on the number of service counters needed for stores to be built in the future, a supermarket chain wanted to obtain information on the length of time (in minutes) required to service customers. To find thedistribution of customer service times, a sample of 60 customers’ service times was recorded and are shown here:3.6 1.9 2.1 .3 .8 .2 1.0 1.4 1.8 1.61.1 1.8 .3 1.1 .5 1.2 .6 1.1 .8 1.71.4 .2 1.3 3.1 .4 2.3 1.8 4.5 .9 .7.6 2.8 2.5 1.1 .4 1.2 .4 1.3 .8 1.31.1 1.2 .8 1.0 .9 .7 3.1 1.7 1.1 2.21.6 1.9 5.2 .5 1.8 .3 1.1 .6 .7 .6a. Construct a stem and leaf plot for the data.b. What fraction of the service times are less than or equal to 1 minute?c. What is the smallest of the 60 measurements?
To decide on the number of service counters needed for stores to be built in the future, a supermarket chain wanted to obtain information on the length of time (in minutes) required to service customers. To find the
distribution of customer service times, a sample of 60 customers’ service times was recorded and are shown here:
3.6 1.9 2.1 .3 .8 .2 1.0 1.4 1.8 1.6
1.1 1.8 .3 1.1 .5 1.2 .6 1.1 .8 1.7
1.4 .2 1.3 3.1 .4 2.3 1.8 4.5 .9 .7
.6 2.8 2.5 1.1 .4 1.2 .4 1.3 .8 1.3
1.1 1.2 .8 1.0 .9 .7 3.1 1.7 1.1 2.2
1.6 1.9 5.2 .5 1.8 .3 1.1 .6 .7 .6
a. Construct a stem and leaf plot for the data.
b. What fraction of the service times are less than or equal to 1 minute?
c. What is the smallest of the 60 measurements?
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