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anonymous

  • 5 years ago

The accompanying table shows the scores on a classroom test. What is the population standard deviation? x: 100, 95,90,80,75, 72, 70 f: 7, 2, 10, 4, 2, 3, 4

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  1. anonymous
    • 5 years ago
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    ok, so first we find the average of the population

  2. anonymous
    • 5 years ago
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    is it possible to do this on the calculator?

  3. anonymous
    • 5 years ago
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    of course

  4. anonymous
    • 5 years ago
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    is 10.74054817 correct?

  5. anonymous
    • 5 years ago
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    no, i got 88,

  6. anonymous
    • 5 years ago
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    ill show you why, its long tedious, but simple. bear with me

  7. anonymous
    • 5 years ago
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    wait, did you get 10.74054817 for the average?

  8. anonymous
    • 5 years ago
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    wait before you do all that can't you put it in the table on the calculator and then hit 1var stats and type in (L1,L2)

  9. anonymous
    • 5 years ago
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    well its population standard deviation remember

  10. anonymous
    • 5 years ago
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    yes, but you need to find the average of the population first. did you do that?

  11. anonymous
    • 5 years ago
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    thats not the way we did it so im not sure how to do that..

  12. anonymous
    • 5 years ago
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    find the average? you know. if we have 6,8,4 we find the average by (6+8+4)/3= 6 so the average of this population is 6

  13. anonymous
    • 5 years ago
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    ill do this in the calculator can you look at the other two please?

  14. anonymous
    • 5 years ago
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    ok

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spraguer (Moderator)
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