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2 years ago

What is 20% of 650g?

Mathematics

1 answer:

melomori [17]2 years ago

4 0

20%*650g= $\frac{650g}{5}=130g$ .

Therefore, 20% of 650g is 130g.

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2 years ago

A random sample is drawn from a normally distributed population with mean μ = 31 and standard deviation σ = 1.9. Calculate the p

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Answer:

For sample size n = 39 ; P(X < 31.6) = 0.9756

For sample size n = 76 ; P(X < 31.6) = 0.9970

Step-by-step explanation:

Given that:

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standard deviation σ = 1.9

sample mean $\overline X$ = 31.6

Sample size n Probability

The probabilities that the sample mean is less than 31.6 for both sample size can be computed as follows:

For sample size n = 39

$P(X < 31.6) = P(\dfrac{\overline X - \mu}{\dfrac{\sigma }{\sqrt{n}}}< \dfrac{\overline X - \mu}{\dfrac{\sigma }{\sqrt{n}}})$

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$P(X < 31.6) = P(Z< \dfrac{31.6 - 31}{\dfrac{1.9 }{\sqrt{39}}})$

$P(X < 31.6) = P(Z< \dfrac{0.6}{\dfrac{1.9 }{6.245}})$

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P(X < 31.6) = 0.9756

For sample size n = 76

$P(X < 31.6) = P(\dfrac{\overline X - \mu}{\dfrac{\sigma }{\sqrt{n}}}< \dfrac{\overline X - \mu}{\dfrac{\sigma }{\sqrt{n}}})$

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2 years ago

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2 years ago

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Answer:

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2 years ago