Mathematics: To qualify for a police academy, applicants are given a test of physical fitness. the scores are normally distributed with a mean of 64 and a standard deviation of 9. if only the top 20% of all applicants are selected, find the cut off score. round up your answer to the nearest integer.

To qualify for a police academy, applicants are

Ответ:

haileyrae187

09.06.2020

Mathematics

X₀ = 71.65

Step-by-step explanation:

given,

mean (μ ) = 64

standard deviation (σ) = 9

σ² = 81

selected candidate are top 20 % candidate

P( X > X₀) = 0.2

$P( Z \dfrac{X_0-\mu}{\sigma}) = 0.2$

$P( Z \dfrac{X_0-64}{9})= 0.2$

P( Z > Z₀) = 0.2

$Z_0 = 0.85 = \dfrac{X_0-64}{9}$

X₀ = 71.65

Hence, the cut off score is equal to X₀ = 71.65

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Ответ:

lwattsstudent

26.09.2020

Mathematics

K.A

Step-by-step explanation:The correct answer is in the photo . I tried to copy the answer here but it was wrong the (0,250) (50,0) ? Hmm anywayss thank me later!!

Sean tried to drink a slushy as fast as he could. He drank 5 milliliters of slushy each second and f

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To qualify for a police academy, applicants are given a test of physical fitness. the scores are normally distributed with a mean of 64 and a standard deviation of 9. if only the top 20% of all applicants are selected, find the cut off score. round up your answer to the nearest integer.

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