Hypothesis Tests about a Mean (sigma unknown) with the TI 83/84: T-Test

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From "Introduction to Statistics, Think & Do"

This demonstration shows you how to conduct a hypothesis test about a mean when sigma (the population standard deviation) is not known. This uses the T-Test function in the TI 83/84 family of graphing calculators.

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  1. Scott Stevens
  2. Student's T-test
  3. Statistical Hypothesis Testing
  4. t-test
  5. significance test
  6. test of significance
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Комментарии
Автор

You answered with the standard deviation known!

Skithewest
Автор

The standard deviation of the population was given from the sample of size 40. So yes, this is known. What is NOT known is the standard deviation of the population. So I do not understand why you are so upset?

irwinbramson
Автор

The critical value at the end is incorrect. You forgot to that you changed it to a left tail test in order to show the difference. Should be a 2 tailed test Critical value of 2.023

millinatheinmtat
Автор

You solved with standard deviation thanks for waisting my time

dubswoodward