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anonymous

  • one year ago

A data research company finds that monthly sales of hard disks in California is 1.445 million units on average with a standard deviation of 45,000. What is the z-score corresponding to 1.500 million units

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  1. anonymous
    • one year ago
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    @rational This one seems easy as well but again I cant get it. I just dont seem to be good at this whole z-units thing

  2. rational
    • one year ago
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    45,000 = 0.045 million

  3. Vocaloid
    • one year ago
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    z-score formula: z-score = (given data value - mean)/standard deviation

  4. rational
    • one year ago
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    mean = 1.445 standard deviation = 0.045 given data value = 1.5 plug them in the zscore formula given by Vocaloid

  5. anonymous
    • one year ago
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    .0005

  6. rational
    • one year ago
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    doesn't look correct try again

  7. rational
    • one year ago
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    z-score = (given data value - mean)/standard deviation = (1.5 - 1.445)/0.045 = ?

  8. anonymous
    • one year ago
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    \[1.5-1.445/.0045\]

  9. anonymous
    • one year ago
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    12.22

  10. rational
    • one year ago
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    try again

  11. anonymous
    • one year ago
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    1.222 sorry

  12. rational
    • one year ago
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    Yep!

  13. anonymous
    • one year ago
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    Ty so much!

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