December 2011
Intermediate to advanced
1088 pages
24h 50m
English
book
Microsoft® Excel® 2010 Formulas & Functions Inside Out
by Helmut Reinke Egbert Jeschke Sara Unverhau, Eckehard Pfeifer, Bodo Fienitz, and Jens Bock
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Z.TEST()/ZTEST()
Syntax. Z.TEST(array,μ0,sigma)
Definition. This function returns the one-tailed probability value for a Gauss test (normal distribution). For the expected value of a random variable (μ0), the Z.TEST() function returns the probability that the sample mean would be greater than the average of observations in the data set (array)—that is, the observed sample mean.
Arguments
array (required). The array or range of data against which to test μ0.
μ0 (required). The value to test.
sigma (optional). The known standard deviation of the population. If this argument is not specified, the standard deviation of the sample is used.
Note
If array is empty, the Z.TEST() function returns the #N/A error.
Z.TEST() is calculated as follows when sigma is ...
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