A Comprehensive Guide of | What is Business Statistics

Running head: Business Statistics
Business Statistics
Name of the Student
Name of the University

Business Statistics2
Table of Contents
Q9...............................................................................................................................................3
Q1...............................................................................................................................................4
Q2...............................................................................................................................................6
Q3...............................................................................................................................................8
Q4.............................................................................................................................................12
Q5.............................................................................................................................................13
Q6.............................................................................................................................................15
Q7.............................................................................................................................................17
Q8.............................................................................................................................................19
References:...............................................................................................................................22

Business Statistics3
Q9.
The dataset consists of information about the call centre employees of two locations
coded 1 and 2 in the dataset. The idea is to statistical analysis to investigate key relations
between the variables involved and help the management make informed decisions.
The variable of interest in the dataset are:
*Original staff or replacement staff
*Median call time?,
*Median above 3 minutes?
*Number of complaints?
Thus the analysis is done taking these four : two categorical and two numerical variables and
the results are provided below in the report.

Business Statistics4
Q1.
a)
Using the information for call centre 1
1.
1st category of the categorical variable original
2nd category of the categorical variable
replacemen
t
average Median call time? for original is 3.34821052631579
average Median call time? for replacement is 2.93416666666667
descriptive sample
statistics
xbar1 xbar2 s1 s2 n1 n2
3.348
21
2.934
17
0.351
02
0.
4 95 108
2.

Business Statistics5
The sample statistics for call centre 1 employees calculated in excel shows that the average
for median call times for original employees ( 3.35 mins ) is greater than median call times
for the replacement employees ( 2.93 mins ) by (3.35 – 2.93 ) = 0.42
b)
Using the information for call centre 2
1.
1st category of the categorical variable original
2nd category of the categorical variable
replacemen
t
average Median call time? for original is 3.38857142857143
average Median call time? for replacement is 2.83955357142857
descriptive sample
statistics
xbar1 xbar2 s1 s2 n1 n2
3.3885
7
2.8395
5
0.3996
8
0.
3 91 112
2.

Business Statistics6
The sample statistics for call centre 2 employees calculated in excel shows that the average
for median call times for original employees ( 3.39 mins ) is greater than median call times
for the replacement employees ( 2.84 mins ) by (3.39 – 2.84) = 0.55 mins.
c)
Thus from the analysis of both the call centre 1 and call centre 2 it is clear that on average the
median call time of the original employees is higher than the replacement employees.
Q2.
a) Using the information for call centre 1
1.
1st category of the 1st categorical variable original
2nd category of the 1st categorical variable replacement
1st category of the 2nd categorical variable no
2nd category of the 2nd categorical variable yes
descriptive sample statistics
no yes total
original count 18 77 95
original %
18.95
%
81.05
%
100.0
0%