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mihalych1998 [28]
3 years ago
7

a normal distribution has a mean of 10 and a standard deviation of 1 what is the probability of selecting a number between 8 and

11
Mathematics
1 answer:
rusak2 [61]3 years ago
5 0

Answer:

0.815

Step-by-step explanation:

First, find the z-scores.

z = (x − μ) / σ

z₁ = (8 − 10) / 1

z₁ = -2

z₂ = (11 − 10) / 1

z₂ = 1

P(-2 < Z < 1) = P(Z < 1) − P(Z < -2)

Use a chart, calculator, or the empirical rule to find the probability.

Using the empirical rule:

P(-2 < Z < 1) = 0.84 − 0.025

P(-2 < Z < 1) = 0.815

Using a chart:

P(-2 < Z < 1) = 0.8413 − 0.0228

P(-2 < Z < 1) = 0.8185

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Step-by-step explanation:

1 \div (x - 2) + 2  < 0

(1 + 2x - 4) \div ( x- 2) < 0

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You have to put:

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3 years ago
Please find the answer !
algol13

Answer:

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Step-by-step explanation:

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lys-0071 [83]

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<h3>What is the binomial probability distribution?</h3>

It is the probability of exactly <u>x successes on n repeated trials, with p probability</u> of a success on each trial.

The expected value of the binomial distribution is:

E(X) = np

The standard deviation of the binomial distribution is:

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In this problem, we have that the parameters are given as follows:

n = 4, p = 0.75.

Hence the mean and the standard deviation are given as follows:

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More can be learned about the binomial distribution at brainly.com/question/24863377

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1/2 of 22:
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2/3 of 16
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