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DarkendSinz30

A Math test has a mean of 39 and standard deviation of 18.0. Find the corresponding z scores for: I. a test score of 31 II. a test score of 100 Please show all of your work

  • one year ago
  • one year ago

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  1. sirm3d
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    the z score formula is \[z=\frac{ obsv - mean }{ std.dev. }\] i'll leave the computation to you. post your answers here.

    • one year ago
  2. DarkendSinz30
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    what is obsv?

    • one year ago
  3. DarkendSinz30
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    z=31-39/18.0 correct?

    • one year ago
  4. DarkendSinz30
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    z=100-39/18.0 = 3.4

    • one year ago
  5. DarkendSinz30
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    z=31-39/18.0=.44

    • one year ago
  6. DarkendSinz30
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    is this right so far?

    • one year ago
  7. sirm3d
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    there is a negative sign

    • one year ago
  8. sirm3d
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    I. z = -0.44 II. z = 3.4

    • one year ago
  9. DarkendSinz30
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    okay so I was on the right track then just forgot the negative sign

    • one year ago
  10. sirm3d
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    just be careful with the signs.

    • one year ago
  11. DarkendSinz30
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    Thank you so much for the help.

    • one year ago
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