If z = 1.96,the standard deviation is 2.5,and the error is plus or minus $0.50,what is the
Approximate sample size needed for this study?
A)96
B)25
C)19
D)48
E)49

Question

Quizplus · Accepted Answer

The sample size can be calculated using the formula: n = (z^2 * s^2) / e^2, where z is the z-score, s is the standard deviation, and e is the error. Plugging in the given values, we get: n = (1.96^2 * 2.5^2) / 0.50^2 = 96.04. Rounding up to the nearest whole number, the approximate sample size needed is 96.

If Z = 196,the Standard Deviation Is 2