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ZTEST

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This function returns the significance value of a z-test. The z-test generates a standard score for x with respect to the set of data and returns the two-tailed probability for the normal distribution.

ZTEST(*array*,*x*,*sigma*)

This function has these arguments:

Argument | Description |
---|---|

array |
Array of data to test |

x |
Value at which to test |

sigma |
[Optional] Known standard deviation for the population; if omitted, the calculation uses the sample standard deviation |

If sigma is not specified, the calculated standard deviation of the data in array is used.

The equation for calculating the z-test is as follows, where *n* is the number of data points.

Accepts numeric data for all arguments. Returns numeric data.

ZTEST(A2:D12,40,0.877)

ZTEST(R2C1:R12C4,2)

ZTEST({5,10,15,12,11,8,16,7},10) gives the result 0.355512703503418

ZTEST({5,10,15,12,11,8,16,7},10,3) gives the result 0.318675944098237

See Also