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2 years ago

A? B? C? D? Number 10 on conexus <3 If correct I’ll give brainlest

Mathematics

2 answers:

Nikitich [7]2 years ago

6 0

Answer:

Step-by-step explanation:

ZanzabumX [31]2 years ago

4 0

D lol exactly yiu yeah arte yr

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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.

8 0

3 years ago

Multiply each polynomial <br><br> (x + 5)(x+4)<br><br> teach me step by step

lara [203]

Answer: x^2 + 9x + 20

Step-by-step explanation:

Foil Method: (a + b) (c + d) = ac + ad + bc + bd

Lets say:

a = x

b = 5

c = x

d = 4

Plugging in the numbers: xx + 4x + 5x + 5*4

Combine like terms:

xx = x^2

4x + 5x = 9x

5 * 4 = 20

You're then left with: x^2 + 9x + 20

6 0

2 years ago

The lines below are parallel. If the slope of the green line is -2, what is the slope of the redline?

scoray [572]

D. -2, if the lines are parallel then the slope is the same but the y-int is different

3 0

2 years ago

What is the number for PI?

DerKrebs [107]

3.14

This is typically what you would use but there are several other numbers after 3.14

3 0

3 years ago

Is 17/72 closer to 0, 0.5, or 1

Brums [2.3K]

Answer: it is closer to 0

Step-by-step explanation:

17 divided by 72 is .23 and that is less than half and closer to 0 therfore the answer is 0

7 0

3 years ago