The proportion of field mice weighing more than 33 grams in the distribution will be about 0.2275
- Mean, μ = 25 grams
- Standard deviation, σ = 4 grams
- Score, X = 33 grams
We need to calculate the P(Z > Zscore)
Recall :
Zscore = (X - μ) ÷ σ
For X > 33 :
Zscore = (33 - 25) ÷ 4 = 2
Therefore, the probability would be expressed as :
P(Z > 2) = 1 - P(Z < 2)
From the normal distribution table :
P(Z < 2) = 0.97725
Therefore,
P(Z > 2) = 1 - 0.97725 = 0.02275
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Answer:
The starting number is 78.
Explanation:
(x / 3) / 2 = 13
divide a number by 3 (x / 3)
divide in half (x / 3) / 2
You get 13 (x / 3) / 2 = 13
Reverse the problem.
13 * 2 = 26
26 * 3 = 78
x = 78
Plug in the number.
(78 / 3) / 2 = 13
78 / 3 = 26
26 / 2 = 13
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