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vovangra [49]
2 years ago
14

About 9% of the population has a particular genetic mutation. 400 people are randomly selected. Find the mean for the number of

people with the genetic mutation in such groups of 400
Mathematics
1 answer:
never [62]2 years ago
7 0

Answer:

36 people

Step-by-step explanation:

The expected value E(X) = mean of sample = np

Where, p = population proportion, p = 9% = 0.09

n = sample size, = 400

The mean of the number of people with genetic mutation, E(X) = np = (400 * 0.09) = 36

36 people

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Alex787 [66]
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[-b (+-) sqrt (b^2 - 4ac)] / (2a)

we know that a b and c are in a quadratic at these positions.
ax^2 + bx + c

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split into the + and - for 2 answers
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4 0
3 years ago
Read 2 more answers
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