Business Statistics

3. Name ID
Subroto Kumar Dass 114 141 025
Monika Akbar 114 141 022
Abdullah Al Nabil 111 142 328

4. Graphic Presentation:
Bar Chart
Pie Chart or a circle graph:
Histogram

5. 0
20
40
60
80
100
120
1 2 3 4
5
6
7
8
9
10
AxisTitle
1 2 3 4 5 6 7 8 9 10
Family Income(X) 47 65 48 20 55 72 65 86 39 112
Daily Expense(Y) 0.25 0.36 0.27 0.15 0.33 0.43 0.32 0.41 0.28 0.4
Some student’s daily expenditure and their family monthly income

6.  Decide on the number of classes :
 Determine the class interval or width
So, the family income interval is 23.
So, the student’s daily expenses interval is 0.07.

7.  Set the Individual class limits:
Example –
family incomes class limits is, 20-43 and
student’s daily expenditure class limits is,0.15-0.22
 Count the number of items in each class:
Example -
Family income
Class Frequency
20-43 2
Student’s Daily Expenses
Class Frequency
0.15-0.22 1

8. 1. Mean.
2. Mode.
3. Median.
Mean (Arithmetic Mean).

9.  Mode:
Family income mode is, It is the information about
student’s family income 20,39,47,48,55,65,65,72,86,112
So the mode is 65.
Median:

10. Student’s daily expenditure median is,

11. 1. Range:
2. Inter-quartile range (IQR):
3. Standard Deviation:
Range:
Range=Highest value – Lowest value
the family income range is Range=112-20
the student’s daily expenditure range is, Range=0.43-0.15
Inter-quartile range (IQR):

13. Family Income
Daily expenses

14. Five number Summary and Box Whisker Plot:

15.  Lower fence = -1.5()
 Upper fence = +1.5()
family income, Upper fence =109.5

16. 0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
0 20 40 60 80 100 120
Scatter diagram:
Daily Expense
Family Income (X) 20 39 47 48 55 65 65 72 86 112
Daily Expense(Y) 0.15 0.25 0.27 0.28 0.32 0.33 0.36 0.40 0.41 0.43

17. y = 0.0029x + 0.1446
R² = 0.7447
0
0.1
0.2
0.3
0.4
0.5
0 20 40 60 80 100 120
Student’sdailyexpenditure
Family income
Daily Expense
Daily Expense
Linear (Daily Expense)

18. y = 0.0029x + 0.1446
R² = 0.7447
0
0.1
0.2
0.3
0.4
0.5
0 50 100 150
Student’sdailyexpenditure
Family income
Daily Expense
Daily Expense
Linear (Daily Expense)