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how do i use my TI 84 calculator when solving c=0.80?? Find the critical value z...

how do i use my TI 84 calculator when solving c=0.80??

Find the critical value z c necessary to form a confidence interval at the level of confidence shown c= 0.80


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Answer #1

The critical value of Z necessary to form a confidence interval at the level of confidence 0.80 is = = = 1.282

We have to press the '2ND' button on TI-84 calculatorand then press the 'VARS' button which has the second function of 'DISTR'. Next, we should navigate down to the 'invNorm(' option by pressing the '3' button on the calculator. Enter 0.9 on the area TO THE LEFT of the value.

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