There's sometimes a stereotype that in marriage the husband is often older than the wife. The...

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There's sometimes a stereotype that in marriage the husband is often older than the wife. The...

There's sometimes a stereotype that in marriage the husband is often older than the wife. The British census took a random sample of 199 couples, and found that on average, the husband was 2.235 years older than the wife, with the exception of 4.075 years.

a. Should we use the T or Z distribution for this problem and why?

math Statistics-And-Probability

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Answer 1

Answer #1

Here we do not know the population variance so we can not use Z distribution so you should use the T distribution for this problem .

Thank You !

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Answer 2

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