In: Statistics and Probability
Find Mean, median, standard deviation,maximum and minimum. Number of divorces in February of 1996 per state. 548,315,239,214,821,0,1290,1823,2654,3852,0,2678,4220,1573,1056,957,2076,164,218,446,1038,302,839,77,1912,528,2668,1277,3088,5003,1722,3385,1698,1143,653,0,1606,7668,360,451,263,0,887,1981,866,356,2725,1359,0,156,411,0.
Solution:
x | x2 |
548 | 300304 |
315 | 99225 |
239 | 57121 |
214 | 45796 |
821 | 674041 |
0 | 0 |
1290 | 1664100 |
1823 | 3323329 |
2654 | 7043716 |
3852 | 14837904 |
0 | 0 |
2678 | 7171684 |
4220 | 17808400 |
1573 | 2474329 |
1056 | 1115136 |
957 | 915849 |
2076 | 4309776 |
164 | 26896 |
218 | 47524 |
446 | 198916 |
1038 | 1077444 |
302 | 91204 |
839 | 703921 |
77 | 5929 |
1912 | 3655744 |
528 | 278784 |
2668 | 7118224 |
1277 | 1630729 |
3088 | 9535744 |
5003 | 25030009 |
1722 | 2965284 |
3385 | 11458225 |
1698 | 2883204 |
1143 | 1306449 |
653 | 426409 |
0 | 0 |
1606 | 2579236 |
7668 | 58798224 |
360 | 129600 |
451 | 203401 |
263 | 69169 |
0 | 0 |
887 | 786769 |
1981 | 3924361 |
866 | 749956 |
356 | 126736 |
2725 | 7425625 |
1359 | 1846881 |
0 | 0 |
156 | 24336 |
411 | 168921 |
0 | 0 |
--- | --- |
x=69566 | x2=207114564 |
The sample mean is
Mean
= (x
/ n) )
=548+315+239+214+821+0+1290+1823+2654+3852+0+2678+4220+1573+1056+957+2076+164+218+446+1038+302+839+77+1912+528+2668+1277+3088+5003+1722+3385+1698+1143+653+0+1606+7668+360+451+263+0+887+1981+866+356+2725+1359+0+156+411+0
/ 52
= 69566 / 52
=1337.8077
Mean = 1337.81
Median :
Observations in the ascending order are :
0,0,0,0,0,0,77,156,164,214,218,239,263,302,315,356,360,411,446,451,528,548,653,821,839,866,887,957,1038,1056,1143,1277,1290,1359,1573,1606,1698,1722,1823,1912,1981,2076,2654,2668,2678,2725,3088,3385,3852,4220,5003,7668
Here, n=52 is even.
M=Value of(n / 2)th observation+Value of(n /
2+1)th observation / 2
=Value of(52 / 2)th observation+Value of(52 /
(2+1)th observation) /2
=Value of 26th observation+Value of 27th
observation / 2
=866+8872
=876.5
Median =876.5
The sample standard is S
S =(
x2 ) - ((
x)2 / n ) n -1
=(207114564-(69566)2
52 / 51)
=207114564-93065929.9231
/51
=114048634.0769
/ 51
=2236247.727
=1495.4089
The sample standard is = 1495.41
Maximum Number = 7668
Minimum Number = 0