Exercise 1
Monthly salaries (in €) for a sample of 20 employees
a) Salaries Number of employees (2 decimals)
nj*xj nj*(xj-x) nj*(xj-x)^2 Range 1550
650 1 1 5.00% 5.00% 650 -550 302500 Mean 1200
700 4 5 20.00% 25.00% 2800 -2000 1000000 Median 1000
850 3 8 15.00% 40.00% 2550 -1050 367500 Mode 1500
1000 3 11 15.00% 55.00% 3000 -600 120000 3rd Q 650
1500 5 16 25.00% 80.00% 7500 1500 450000 27th Q
1700 2 18 10.00% 90.00% 3400 1000 500000 83th Q
1900 1 19 5.00% 95.00% 1900 700 490000 Sample variance
2200 1 20 5.00% 100.00% 2200 1000 1000000 Sample standard deviation
TOTAL 20 100.00% 24000 0 CV
MEAN 1200
b) Use the table above to complete those statements given at page 61. c) (Vertical) BAR Chart
xjnjNjfj (%) Fj (%)
650 700 850 1000 1500 1700 1900 2200
0.00%
5.00%
10.00%
15.00%
20.00%
25.00%
30.00%
MONTHLY SALARIES
MONTHLY SALARIES
