The cumulative probability up to the mean plus 1 standard deviation for a Normal distribution - not any distribution - is 84%. The reference is any table (or on-line version) of z-scores for the standard normal distribution.
It equals 14641.
The z score, for a value y, is (y - 18.6)/4
You need the mean and standard deviation in order to calculate the z-score. Neither are given.
It is (124 - 100)/8 = 24/8 = 3
i y=use Z-test
You would be in the 99th percentile (98.61, to be more precise).
Bob scored 300 or 700.
It equals 14641.
6.3
1.41
The z score, for a value y, is (y - 18.6)/4
The variance is the square of the standard deviation.This question is equivalent tocan s = s^2The answer is yes, but only in two cases.If the standard deviation is 1 exactly, then so is the variance.If the standard deviation is 0 exactly, then so is the variance.If the standard deviation is anything else, then it is not equal to the variance.You are not likely to find these special cases in practical problems, so from a practical sense, you should think that they are generally not equal.
0.8413
Can someone help me find the answer for a sample n=36 with a population mean of of 76 and a mean of 79.4 with a standard deviation of 18?
3.6
okay wikianswers messed up the question. H0: M=23; H1: M not 23; n=50; x-bar = 21.25; standard deviation = 5. please help!
64.