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love_to_love_you

  • one year ago

Please help will fan and medal

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  1. love_to_love_you
    • one year ago
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    The test scores for a math class are shown below. 83, 85, 82, 93, 83, 84, 95, 87, 86, 94 What is the standard deviation of the data set? 4.7

  2. love_to_love_you
    • one year ago
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    @jim_thompson5910 I need help againnn same type of problem

  3. jim_thompson5910
    • one year ago
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    first you need to find the mean mean = add up all the numbers then divide by 10

  4. love_to_love_you
    • one year ago
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    87.2?

  5. love_to_love_you
    • one year ago
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    @jim_thompson5910

  6. jim_thompson5910
    • one year ago
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    yes

  7. jim_thompson5910
    • one year ago
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    now subtract the mean from each data value make a new column of these values

  8. love_to_love_you
    • one year ago
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    like subtract 87.2 from 83 and all the others?

  9. jim_thompson5910
    • one year ago
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    yes like 83 - 87.2 = -4.2, and the same for the others

  10. love_to_love_you
    • one year ago
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    83, 85, 82, 93, 83, 84, 95, 87, 86, 94 --------------------------------- -4.2, -2.2, -5.2, 5.8, -4.2, -3.2, 7.8, -0.2, -1.2, 6.8

  11. jim_thompson5910
    • one year ago
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    square each of those values

  12. love_to_love_you
    • one year ago
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    17.64, 4.84, 27.04, 33.64, 17.64, 10.24, 60.84, 0.04, 1.44, 46.24

  13. jim_thompson5910
    • one year ago
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    now add up all of those values

  14. love_to_love_you
    • one year ago
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    219.6

  15. jim_thompson5910
    • one year ago
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    divide that by 10 to get 21.96

  16. jim_thompson5910
    • one year ago
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    then take the square root of that to get the standard deviation

  17. jim_thompson5910
    • one year ago
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    this is considered the population standard deviation

  18. love_to_love_you
    • one year ago
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    Thank you!

  19. jim_thompson5910
    • one year ago
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    yw

  20. love_to_love_you
    • one year ago
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    I have one last question but I don't really have time to do it so could you just show me this one?

  21. love_to_love_you
    • one year ago
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    In triangle RST angle S is a right angle and csc R = 17/15. What is tan T? 8/15

  22. jim_thompson5910
    • one year ago
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    well if you don't have time, then you can come back later and I can help out

  23. love_to_love_you
    • one year ago
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    Can we work through it quickly right now?

  24. jim_thompson5910
    • one year ago
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    |dw:1433474348886:dw|

  25. jim_thompson5910
    • one year ago
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    csc R = 17/15 |dw:1433474389882:dw| since csc = hyp/opp

  26. jim_thompson5910
    • one year ago
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    find the length of leg SR and that will help you determine tan(T)

  27. jim_thompson5910
    • one year ago
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    |dw:1433474448784:dw|

  28. love_to_love_you
    • one year ago
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    8?

  29. love_to_love_you
    • one year ago
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    @jim_thompson5910

  30. jim_thompson5910
    • one year ago
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    yep 8

  31. love_to_love_you
    • one year ago
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    ok

  32. jim_thompson5910
    • one year ago
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    then you use tan = opp/adj

  33. love_to_love_you
    • one year ago
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    Thank you!!!

  34. jim_thompson5910
    • one year ago
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    yw

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