Scores on a certain test follow the normal curve with an average of 1350 and a standard deviation of 120. What percentage of test takers score below 1230? (Use the empirical rule.) 16%, 1230 is one ...

In this article we review two historical approximations to the Poisson and binomial cumulative distribution functions (CDFs); that is, the Wilson—Hilferty and Camp—Paulson approximations. Both of ...

This article examines the accuracy of normal approximations to confidence limits for the binomial (n,p) parameter p. The method of getting "exact" values from an F table is too slow for practical use ...

The binomial distribution describes the probability of the number of successes for a fixed number of identical independent experiments, each with binary out-put. In real life, practical applications ...

The RISKDIFF option in the TABLES statement provides estimates of risks (or binomial proportions) and risk differences for 2 ×2 tables. This analysis may be appropriate when comparing the proportion ...