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2 years ago

Please help, and show work, I need to understand. Thank you

Mathematics

1 answer:

Alexus [3.1K]2 years ago

8 0

Answer:

Step-by-step explanation:

you cant really see the paper

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Company A is trying to sell its website to Company B. As part of the sale, Company A claims that the average user of their site

Ymorist [56]

Answer:

$L = 3.975$

Step-by-step explanation:

Given

See comment for data

Required

The lower limit 94% confidence interval

First, calculate the mean

$\bar x =\frac{\sum x}{n}$

$\bar x =\frac{0.9+10+0.9+8.7+4.8+2.6+1+13.3+9.5+8.9+8.9+4.6}{12}$

$\bar x =\frac{74.1}{12}$

$\bar x =6.175$

Next, calculate the standard deviation using:

$\sigma = \sqrt{\frac{\sum(x - \bar x)^2}{n}}$

So, we have:

$\sigma = \sqrt{\frac{(0.9 - 6.175)^2 +(10- 6.175)^2 +.................+(8.9- 6.175)^2 +(4.6- 6.175)^2}{12}}$

$\sigma = \sqrt{\frac{197.2625}{12}}$

$\sigma = \sqrt{16.4385416667}$

$\sigma = 4.054$

For 94% interval, the z score is

$z = 1.88$

So, the margin of error (E) is:

$E = z * \frac{\sigma}{\sqrt n}$

$E = 1.88 * \frac{4.054}{\sqrt {12}}$

$E = 1.88 * \frac{4.054}{3.464}$

$E = 2.200$

The confidence interval of the true mean is:

$CI = (\bar x \± E)$

The lower limit (L) is:

$L = \bar x -E$

$L = 6.175 -2.200$

$L = 3.975$

and the upper limit (U) is

$U = \bar x + E$

$U = 6.175 + 2.200$

$U = 8.375$

5 0

2 years ago

Sketch the figure: Two different isosceles triangles with perimeter 4a + b

Nikitich [7]

The two triangles with the given perimeter is attached .

Perimeter is the sum of all sides.

For the first triangle , sies are 2a,2a and b.

So the perimeter is

$Perimeter = 2a+2a+b
\\
Perimeter = 4a+b$

For the second triangle, sides are a,a, and 2a+b. Therefore perimeter is

$Perimeter = a+ a + 2a+b
\\
Perimeter = 4a+b$

So for both triangles, perimeter is

$4a+b$

3 0

2 years ago

Yeah ya boy just needs some help because I’m not good with word problems

erik [133]

Answer:

I'm sorry cheif I can't help, but just to me funny burn it

Step-by-step explanation:

get the devil's test

grab some gasoline

pour on devils work

lite fire

it shall be no more torture

3 0

2 years ago

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How to write 8% as ratio in simplest form

dusya [7]

Answer:8:100

Step-by-step explanation:

Because the 8% is out of 100

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2 years ago

What is the equivalent of 306 meters?

Readme [11.4K]

Answer:

0.306 in kilometers

30600 in cm

306000 in mm

3.06e+8 in micrometer

3.06e+11 in nanometer

0.19014 in mile

334.646 in yard

1003.94 in foot

12047.2 in inch

0.165227 in nautical mile

Step-by-step explanation:

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2 years ago