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What test is used as an alternative to the z test when the population variance is...

What test is used as an alternative to the z test when the population variance is unknown?

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Answer #1

The alternative test to z test when population standard variance is unknon is the t test.

There are 3 different t test based on our sample.

1. t test for one sample mean.

2. t test for difference between two sample means.

3.Paired t test.

Based on our problem we select an appropriate test.

And t test is the alternative to z test when population variance is unknon

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