Which of the following is closest to the proportion of field mice with a weight greater than 33 grams?

A researcher is studying a group of field mice. The distribution of the weight of field mice is approximately normal with mean 25 grams and standard deviation 4 grams. Which of the following is closest to the proportion of field mice with a weight greater than 33 grams?

A. 0.023

B. 0.046

C. 0.954

D. 0.977

E. 1.000

2 Answers

Relevance
  • 1 month ago
    Favorite Answer

    P(W > 33) => P(z > (33 - 25)/4)

    i.e. P(z > 2)

    or, 1 - P(z < 2)

    From normal table we get:

    1 - 0.9772 = 0.0228

    so, about 0.023 => 2.3%

    :)>

  • Bryce
    Lv 7
    1 month ago

    D. 0.977                 

Still have questions? Get your answers by asking now.