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The Binomial Table
Table A-3 shows probabilities for the binomial distribution (see Chapter 8).
To use Table A-3, do the following:
1. Find these three numbers for your particular problem:
• The sample size, n
• The probability of success, p
• The x-value for which you want p(X = x)
2. Find the section of Table A-3 that’s devoted to your n.
3. Look at the row for your x-value and the column for your p.
4. Intersect that row and column. You have found p(X = x).
5. To get the probability of being less than, greater than, greater than or
Statistics For Dummies, 2nd Edition
equal to, less than or equal to, or between two values of X, you add
the appropriate values of Table A-3 using the steps found in Chapter 8.
For example, if n=10, p=0.6, and you want p(X=9), go to the n=10 section,
the x=9 row, and the p=0.6 column to find 0.04.

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