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13 April, 20:10

The weight of laboratory mice follows a normal distribution, with a mean of 0.68 ounce and a standard deviation of 0.02 ounce. What percentage of the mice weigh between 0.62 ounce and 0.74 ounce?

A. 99.7%

B. 95%

C. 68%

D. 47.5%

E. 34%

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Answers (2)
  1. 13 April, 23:04
    0
    A. 99.7%

    Step-by-step explanation:

    Calculate each z-score.

    z = (x - μ) / σ

    z = (0.74 - 0.68) / 0.02

    z = 3

    z = (x - μ) / σ

    z = (0.62 - 0.68) / 0.02

    z = - 3

    You can use a z-score table, or use the empirical rule.

    P (-3 < z < 3) = 99.7%.
  2. 13 April, 23:33
    0
    The answer is letter D
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Home » Mathematics » The weight of laboratory mice follows a normal distribution, with a mean of 0.68 ounce and a standard deviation of 0.02 ounce. What percentage of the mice weigh between 0.62 ounce and 0.74 ounce? A. 99.7% B. 95% C. 68% D. 47.5% E. 34%
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