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4 years ago

What is the y intercept

Mathematics

1 answer:

oksian1 [2.3K]4 years ago

8 0

It’s when when the line goes across the y-axis

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Approximately 3.47 meters is equal to 11.4 feet

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How many solutions does the equation 4x+2(x+5) = ( 2x-4) have?

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4 years ago

Is 1/8 x 4= 1/12 or 4/8

aliina [53]

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1/8 x 4 = 4/8

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2 years ago

A random sample of 35 business students required an average of 50.7 minutes to complete a statistics exam. Assume that the popul

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Answer:

(47.3, 54.1)

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:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.025 = 0.975$ , so Z = 1.96.

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.

$M = 1.96\frac{10.4}{\sqrt{35}} = 3.4$

The lower end of the interval is the sample mean subtracted by M. So it is 50.7 - 3.4 = 47.3

The upper end of the interval is the sample mean added to M. So it is 50.7 + 3.4 = 54.1

The answer is (47.3, 54.1).

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3 years ago