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3 years ago

15

Wonder if someone can help me with my math work please

1 answer:

stellarik [79]3 years ago

6 0

Answer:

The slope is negative. The relationship is proportional

Step-by-step explanation:

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Suppose the true proportion of students at a college who study abroad is 0.25. I select a random sample of 40 students from the

Julli [10]

Answer:

$\mu_{\hat p} = 0.25$

$\sigma_{\hat p}= \sqrt{\frac{0.25*(1-0.25)}{40}}= 0.0685$

$z = \frac{0.2-0.25}{0.0685}= -0.730$

And we can use the normal standard distribution or excel to find this probability and we got:

$P(\hat p$

Step-by-step explanation:

We define the parameter as the proportion of students at a college who study abroad and this value is known $p =0.25$ , we select a sample size of n =40 and we are interested in the probability associated to the sample proportion, but we know that the distirbution for the sample proportion is given by:

$\hat p \sim N(p , \sqrt{\frac{p(1-p)}{n}}$

And the paramters for this case are:

$\mu_{\hat p} = 0.25$

$\sigma_{\hat p}= \sqrt{\frac{0.25*(1-0.25)}{40}}= 0.0685$

We want to find the following probability:

$P(\hat p< 0.2)$

For this case since we know the distribution for the sample proportion we can use the z score formula given by:

$z = \frac{\hat p -\mu_{\hat p}}{\sigma_{\hat p}}$

Replacing the info given we got:

$z = \frac{0.2-0.25}{0.0685}= -0.730$

And we can use the normal standard distribution or excel to find this probability and we got:

$P(\hat p$

8 0

3 years ago

Write an equation in slope-intercept form of the line that passes through the given point and

Valentin [98]

Answer:

y=-1/3x+5

Step-by-step explanation:

6=-1/3(-3)+5

6=1+5

6=6

6 0

3 years ago

What is 5\10 plus +8\100

Tasya [4]

Answer:its 0.58

Step-by-step explanation:

5 0

3 years ago

Х+ Зу = 6<br> бx — бу = 4

Sloan [31]

Answer:

the first one is x= 6-3y or if you are going to solve with the y it will be y =2 - x/3

the second one if you are solving for x it will be x= 2/3 + y if you are solving for y it will be x = 2/3 + x

Step-by-step explanation:

hope this helps

8 0

3 years ago

Read 2 more answers

BRAINIST & 20 POINTS <br><br><br> *random answers will be reported*

kolezko [41]

Answer:

6-1

Step-by-step explanation:

3 0

3 years ago