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anonymous

  • one year ago

Find the critical value zc necessary to form a confidence interval at the level of confidence shown: c=0.85 zc= (round to 2 decimal places as needed)

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  1. perl
    • one year ago
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    you can use a table or a calculator to find this

  2. anonymous
    • one year ago
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    is kinda hard for me ... doing in the TI 84

  3. perl
    • one year ago
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    |dw:1436287379018:dw|

  4. perl
    • one year ago
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    with a TI 84 there is a command invNorm

  5. perl
    • one year ago
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    that will give you the z score

  6. perl
    • one year ago
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    first you need to find the area to the left of it

  7. perl
    • one year ago
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    |dw:1436287575051:dw|

  8. perl
    • one year ago
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    TI 84 2nd -> VARS -> 3:invNorm( ) then enter .15/2

  9. perl
    • one year ago
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    that will give you the negative of the z score. then just make it positive

  10. perl
    • one year ago
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    |dw:1436287894144:dw|

  11. anonymous
    • one year ago
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    OHhh Jesus that was easy... Thank you very much... :)

  12. perl
    • one year ago
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    your welcome

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