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3 years ago

Which of the following is an example of a conditional probability?

Mathematics

1 answer:

Aneli [31]3 years ago

5 0

Answer:

The probability a person will ace a test given that the person got a

good night's sleep the previous night.

Step-by-step explanation:

A conditional probability is a probability that something will occur given that something else has happened.

C The probability a person will ace a test given that the person got a

good night's sleep the previous night.

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The mean per capita income is 20,90820,908 dollars per annum with a standard deviation of 407407 dollars per annum. What is the

LiRa [457]

Answer:

$z=\frac{20880-20908}{\frac{407}{\sqrt{55}}}= -0.51$

$z=\frac{20936-20908}{\frac{407}{\sqrt{55}}}= 0.51$

Then we can find the probability of interest with this difference:

$P(-0.51$

And using the normal standard distribution or excel we got:

$P(-0.51$

So then the probability that the sample mean would differ from the true mean by less than 28 dollars from the sample of 55 is approximately 0.390

Step-by-step explanation:

We define the variable of interest as the per capita income and we know the following properties for this variable:

$\mu=20908$ and $\sigma=407$

We want to find this probability:

$P(20908-28$

We select a sample size of n=55 and we define the z score formula given by:

$z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}$

We can find the z score then for 20880 and 20936 and we got:

$z=\frac{20880-20908}{\frac{407}{\sqrt{55}}}= -0.51$

$z=\frac{20936-20908}{\frac{407}{\sqrt{55}}}= 0.51$

Then we can find the probability of interest with this difference:

$P(-0.51$

And using the normal standard distribution or excel we got:

$P(-0.51$

So then the probability that the sample mean would differ from the true mean by less than 28 dollars from the sample of 55 is approximately 0.390

7 0

3 years ago

Carmen had

barxatty [35]

it would depend how much you actually used, but you would take the amount you used and divide it by the total amount of yarn. so if the yarn was 4m long and you used 2m then it would be 2/4 which is 0.5 which is also 50%, so half the yarn was used.

3 0

3 years ago

A boxer needs to lose 3 1/2 in a month to be able to compete as a flyweight. In three weeks, he lowers his weight from 55.5 kg t

tangare [24]

Answer: 1.8kg

55.5-53.8= 1.7 in the first weeks

3.5- 1.7= 1.8 for final week

6 0

3 years ago

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A scientist wants to find the radius, in feet, of this hemispherical dome. He found that the surface area of the entire sphere c

skelet666 [1.2K]

The surface area of a sphere by definition is given by:
A = 4 * π * r ^ 2
Where,
r: radius of the sphere.
Substituting the values we have:
294 = 4 * π * r ^ 2
We cleared the radio:
r ^ 2 = (294) / (4 * π)
Answer:
An equation that I could use to find the dome's radius is:
A. r2 = 294 square feet ÷ 4π

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3 years ago

(X+1)-(-2x - 5)<br><br> Help

Diano4ka-milaya [45]

answer: 3x + 6

x + 1 + 2x + 5 = 3x + 6

remember to first distribute the negative to both terms in the second parentheses which makes the 2x and 5 both positive and then just combine like terms . pls mark brainliest

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3 years ago

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