Question 483170: Please help,-Suppose we want to determine the (binomial) probability (p) of getting 4 heads in 10 flips of a 2-sided coin. Using Table 2 in Appendix B of the text, what values of n, x, and p would we use to look up this probability, and what would be the probability?
Answer by Edwin McCravy(20060)   (Show Source):
You can put this solution on YOUR website!
n=10, x=4, p=.5
If your binomial probability tables are cumulative, which most are, then you
will have to
1. look up the probability with n=10, x=4, p=.5 and find .3770 which is the
probability that you will get 4 or 3 or 2 or 1 or 0 heads,
and then
2. look up the probability with n=10, x=3, p=.5 and find .1719 which is the
orobability that you will get 3 or 2 or 1 or 0 heads,
and then
3. subtract the result from 2 from the result of 1. .3770 - .1719
and get .2051
[If your binomial table is not cumulative you will read it directly as
.2051 with n=10, x=4, p=.5]
Edwin
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