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Eight coins are tossed at a time,256 times Number of heads observed at each throw is recorded and the results are given below. Find the expected frequencies What are the theoretical values of main and standard deviation? Calculate also the mean the S.D. of the observed frequencies.

No. of heads at throw
0
1
2
3
4
Frequency
2
6
30
52
67
No. of heads at throw
5
6
7
8
Frequency
56
32
10
1

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