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ipn [44]
2 years ago
8

PLEASE HELP!! I WILL GIVE BRAINLIEST

Mathematics
1 answer:
Vitek1552 [10]2 years ago
4 0
This should help man

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Three consecutive integers have a sum of 30. Which equation can be used to find x, the value of the smallest of the three number
castortr0y [4]

Answer:

X+(X+1)+X+2)=30

Step-by-step explanation:

7 0
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What’s 5/16 written as a decimal
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You divide 5 and 16 to get the answer: 0.3125.
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Determine if the two lines are parallel, perpendicular, or neither.<br><br> x=5 x=−5
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Step-by-step explanation:

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A male hippopotamus can weigh up to 10,000 pounds. How many tons is 10,000 pounds
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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
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