Statistics for Business Decision Making

Running Head: STATISTICS FOR BUSINESS DECISION MAKING
Statistics for Business Decision Making
Name of the Student
Name of the University
Student ID

1STATISTICS FOR BUSINESS DECISION MAKING
Table of Contents
Answer 1....................................................................................................................................2
Answer 2....................................................................................................................................3
Answer 3....................................................................................................................................3
Answer 4....................................................................................................................................4

2STATISTICS FOR BUSINESS DECISION MAKING
Answer 1
(a) The required frequency distribution table of the examination scores of 20 students
with a class width of 10 is given in the following table:
Examination
score
Freque
ncy
Relative
frequency
Cumulative
frequency
Cumulative relative
frequency
Percent
frequency
50-60 3 0.15 3 0.15 15
60-70 2 0.1 5 0.25 10
70-80 5 0.25 10 0.5 25
80-90 4 0.2 14 0.7 20
90-100 6 0.3 20 1 30
Total 20 1 100
(b) The required histogram showing the percent frequency distribution of the examination
scores is given in the following figure:
50-60 60-70 70-80 80-90 90-100
0
5
10
15
20
25
30
35
Histogram (percent frequency distribution)
Examination Scores
Percent Frequency
The histogram clearly shows that the examination scores of the students are
negatively skewed. This indicates that there are more students who have secured
marks that are higher than the average examination scores. This indicates that the
number of students securing higher examination scores is more than the number of
students securing lower examination scores.