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3 years ago

8x2 + 7x - 4 what is the factor

Mathematics

1 answer:

astraxan [27]3 years ago

5 0

Answer:

Step-by-step explanation:

I think im wrong but give it a try

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Assume that body masses of Goldfinch birds follow a normal distribution with standard deviation equal to 0.04 oz. An ornithologi

il63 [147K]

Answer:

The formula to generate 70% confidence interval is: $[\overline{x} - 0.013, \overline{x} + 0.013]$ , in which $\overline{x}$ is the sample mean.

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:

$\alpha = \frac{1 - 0.7}{2} = 0.15$

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 $1 - 0.15 = 0.85$ , so Z = 1.037.

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.

Assume that body masses of Goldfinch birds follow a normal distribution with standard deviation equal to 0.04 oz.

This means that $\sigma = 0.04$ .

Sample of 10 birds:

This means that $n = 10$ .

The margin of error is of:

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

$M = 1.037\frac{0.04}{\sqrt{10}}$

$M = 0.013$

The lower end of the interval is the sample mean of $\overline{x}$ subtracted by M.

The upper end of the interval is the sample mean of $\overline{x}$ added to M.

Then, the formula to generate 70% confidence interval is: $[\overline{x} - 0.013, \overline{x} + 0.013]$ , in which $\overline{x}$ is the sample mean.

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3 years ago

There are 16 tables in the school lunch room each table can seat 22 students. How many students can be seated at lunch at one ti

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352 . If you multiply 16 by 22 it will give u an answer of 352

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Different examples above! hope this helps c:

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A number is five less than 3 time another number use x for the variable HURRY

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Answer:

10, it's 5 less than 5 times 3

Step-by-step explanation:

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Find the slope of the line that passes through (10, 4) and (3, 1).

LiRa [457]

Answer:

(3,-9)

Step-by-step explanation:

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