TI-84: Finding the Critical Value Using Inverse T

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  • čas přidán 22. 08. 2024
  • Using the TI-84 to find a critical value for a confidence interval for the mean when sigma is unknown.

Komentáře • 7

  • @nicholashurt9016
    @nicholashurt9016 Před 10 měsíci +10

    why is is .975 instead of .95

    • @bradenroark7528
      @bradenroark7528 Před měsícem

      because each side equals the remaining .5 so you gotta divide that by 2

  • @Killer342127
    @Killer342127 Před 3 lety +8

    did not explain entirely what i needed

  • @Eric_Generic
    @Eric_Generic Před rokem

    Super helpful and clear explanation!

  • @chrisclements3862
    @chrisclements3862 Před 3 lety

    how about 2 tailed? thank you

    • @twosigma1371
      @twosigma1371  Před 3 lety +2

      First divide alpha in two to get the area in one tail then use the inverse t. For example, if alpha is 0.05, then there would be 0.025 amount of area in each tail. You can use inverse t with an input of 0.025 and get the negative t-value or use an input area of 0.975 to get the upper t-value (since there would be a cumulative area of 0.975 to the left of the upper t-value). The inverse-t function expects a cumulative area and degrees of freedom (n-1) as the input.

    • @chrisclements3862
      @chrisclements3862 Před 3 lety

      @@twosigma1371 Perfect thank you so much