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2 years ago

Need help got 20min left almost done with class please let me know if you can help me finish this class

Mathematics

2 answers:

yanalaym [24]2 years ago

5 0

Answer:

Linear because every x, it goes -4 in y. Therefore, it is linear.

Hope this helps :)

xeze [42]2 years ago

3 0

The answer is linear becuase for one x, a -4 goes into y
Hope this helps:)

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Triangle: solve for x

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Step-by-step explanation:

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2 years ago

HELP ME PLEASE!!

DiKsa [7]

C=A+B
C₄₁= row=4; column=1
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2 years ago

How many weeks of data must be randomly sampled to estimate the mean weekly sales of a new line of athletic footwear? We want 98

Irina18 [472]

Answer:

$n=(\frac{2.33(1400)}{400})^2 =66.50 \approx 67$

So the answer for this case would be n=67 rounded up

Step-by-step explanation:

Information given

$\bar X$ represent the sample mean for the sample

$\mu$ population mean

$\sigma=1400$ represent the sample standard deviation

n represent the sample size

Solution to the problem

The margin of error is given by this formula:

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

And on this case we have that ME =400 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 98% of confidence interval now can be founded using the normal distribution. And the critical value would be $z_{\alpha/2}=2.33$ , replacing into formula (b) we got:

$n=(\frac{2.33(1400)}{400})^2 =66.50 \approx 67$

So the answer for this case would be n=67 rounded up

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3 years ago