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mylen [45]
3 years ago
12

Please help this is my math homework

Mathematics
1 answer:
erica [24]3 years ago
8 0

Answer:

Friend PLEASE UPLOAD THE PICTURE PROPERLY IT IS NOT READABLE

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4)In order to set rates, an insurance company is trying to estimate the number of sick daysthat full time workers at an auto rep
bagirrra123 [75]

Answer:

A sample of 18 is required.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.92}{2} = 0.04

Now, we have to find z in the Z-table as such z has a p-value of 1 - \alpha.

That is z with a pvalue of 1 - 0.04 = 0.96, so Z = 1.88.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

A previous study indicated that the standard deviation was 2.2 days.

This means that \sigma = 2.2

How large a sample must be selected if the company wants to be 92% confident that the true mean differs from the sample mean by no more than 1 day?

This is n for which M = 1. So

M = z\frac{\sigma}{\sqrt{n}}

1 = 1.88\frac{2.2}{\sqrt{n}}

\sqrt{n} = 1.88*2.2

(\sqrt{n})^2 = (1.88*2.2)^2

n = 17.1

Rounding up:

A sample of 18 is required.

3 0
3 years ago
Plz help me fast Simplify t12/t6
Digiron [165]

Answer:

t^6

Step-by-step explanation:

when dividing exponents, you subtract (refer to exponent rule)

t^12 - t^6 = t^6

4 0
2 years ago
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Given the equation y = |x| - 2 and the x values of -2, -1, 0, 1, 2, substitute x and choose the correct set of y values below.
Marat540 [252]

Answer:

y = {0, -1, -2}

3 0
3 years ago
What is the solution to the equation?
UkoKoshka [18]
\frac{1}{3}x+\frac{1}{3}(2x-15)=3\frac{1}{2}\\\\
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2x+2(2x-15)=21\\\\
2x+4x-30=21\\\\
6x-30=21\ \ |Add\ 30\\\\
6x=51\ \ \ |Divide\ by\ 6\\\\
\boxed{x=\frac{51}{6}=8\frac{1}{2}}
7 0
3 years ago
Find the original price:<br> a house priced at $192030 after its value rose by 3.8%
soldier1979 [14.2K]
Helloooooo
The correct answer is 199327.14
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3 years ago
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