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no t test is similar to z test because t test ie used for unknown observation and z is for the medicne

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no t test is similar to z test because t test ie used for unknown observation and z is for the medicne

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a t test is used inplace of a z-test when the population standard deviation is unknown.

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The"t" test, (called the "small 't' test, to distinguish it from the large 'T' test) is a test for deviation from a known norm, using a smaller sample set than the one required by the large T test.

It is said to have been developed by the head of quality control at the Guinness Brewery in Ireland.

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t-test is the statistical test used to find the difference of

mean between two groups

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t test, because the z test requires knowing the population standard deviation and that's rare. The t test embodies an estimate of the standard deviation.

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