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

weights of cars passing over Bridge part 3
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weights of cars passing over Bridge part 3 class=

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sqdancefan
sqdancefan sqdancefan
  • 03-08-2019

Answer:

  d. 30.42%

Step-by-step explanation:

A suitable calculator pegs the probability of exceeding 0.51724 standard deviations above the mean as about 0.3025 = 30.25%. The closest answer is choice D.

  Z = (X -μ)/σ = (4000 -3550)/870 = 450/870 ≈ 0.51724

_____

Comment on the answer choices

30.42% is the probability of exceeding 3995 pounds, not 4000.

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