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castortr0y [4]
3 years ago
9

PLEASE HELP!! point a= (3,2) point b=(27,30) point c is between point a and b what is c's coordinates

Mathematics
1 answer:
Yuki888 [10]3 years ago
4 0

Answer:

let c is a point between a and b we can find the coordinates of c by using mid-point formula

the coordinate x of c is equal to

x=(x1+x2)÷2

x=(3+27)÷2

x=30÷2

x=15

the coordinate y of c is equal to

y=(y1+y2)÷2

y=(2+30)÷2

y=32÷2

y=16

so the coordinates of c are (15,16)

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Answer:

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Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

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\bar X represent the sample mean for the sample  

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Solution to the problem

The confidence interval for the mean is given by the following formula:

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The confidence interval for this case is given by: (740, 920)

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The margin of error is given by this formula:

ME=z_{\alpha/2}\frac{s}{\sqrt{n}}    (a)

And on this case we have that ME =90 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

n=(\frac{z_{\alpha/2} s}{ME})^2   (b)

The critical value for 95% of confidence interval now can be founded using the normal distribution. And in excel we can use this formla to find it:"=-NORM.INV(0.025;0;1)", and we got z_{\alpha/2}=1.960, replacing into formula (b) we got:

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