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The z-value for the 5% two-tailed threshold is 1.96. What is the 5% two-tailed threshold for...

The z-value for the 5% two-tailed threshold is 1.96. What is the 5% two-tailed threshold for t-tests?

options are: there is no correct answer to this question

-1.98

|1.98|

1.98
Math   Statistics-And-Probability   
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Answer #1

The 5% two tailed threshold value for t-tests depends on the degrees of freedom of the t-statistic.

A two tailed t-test is always of the form:

If for certian degrees of freedom 'df' the two tailed critical value is of the form |t?/2|<t or this can also be written as -t?/2<t< t?/2<t .

So, |t?/2|, -t?/2 and t?/2 .are all threshold values of the t-distribution for df degrees of freedom.

Thus, for the given question |1.98 |, -1.98 and 1.98 .are all threshold values of the t-distribution for given degrees of freedom.

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