meredith48034
meredith48034 meredith48034
  • 03-08-2019
  • Mathematics
contestada

Probability distribution part 2
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Probability distribution part 2 class=

Respuesta :

sqdancefan
sqdancefan sqdancefan
  • 03-08-2019

Answer:

  b.  -0.862

Step-by-step explanation:

The only answer choice with a minus sign is B, which is the correct choice.

When the value of interest is below the mean (2800 is below 3550), the z-score will be negative:

  z = (2800 -3550)/870 = -750/870 ≈ -0.86207 ≈ -0.862

_____

As always, z is computed as ...

  Z = (X -μ)/σ

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