ci_onesample_zreqsize(E, std, cl)
Returns the sample size required to compute a confidence level for the mean with margin of error E, known standard deviation std, and confidence level cl.
See also ci_onesample_pro ci_onesample_z ci_onesample_t
Example
(See NOTE below)
ci_onesample_zreqsize(0.5, 12.1, .95)
2250
NOTE: The data used in this example was taken from the textbook Introductory Statistics 6th Ed. by Neil A. Weiss with kind permission of Addison Wesly Longman, Inc. (AWL). AWL does not endorse nor it supports the Calcugator.