i y=use Z-test
1.71
It equals 14641.
The z score, for a value y, is (y - 18.6)/4
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.
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
Bob scored 300 or 700.
You cannot. There is no information about the distribution, or even what the graph is meant to display!
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
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.
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!