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If a fair coin is tossed 25 times, the probability distribution forthenumber ofheads, X , is given below. Find the mean and the standard deviation
If a fair coin is tossed 25
times, the probability distribution forthenumber ofheads, X
, is given below. Find the mean and the standard deviation of the probability distribution using Excel.
xP(x)
00
10
20
30.0001
40.0004
50.0016
60.0053
70.0143
80.0322
90.0609
100.0974
110.1328
120.155
130.155
140.1328
150.0974
160.0609
170.0322
180.0143
190.0053
200.0016
210.0004
220.0001
230
240
250
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