Y=5x² – 1<br><br> Please answer I need asap thank you!!

Jackie collects data from two different companies each company have for employees the data is listed in the table below which of

Crazy boy [7]

•one of the salary amounts in company B is potentially an outlier.
• the median salaries of both companies are greater than 31000
•the mean salary at company B is greater than company A's

7 0

4 years ago

Read 2 more answers

A researcher studied the radioactivity of asbestos. She sampled 81 boards of asbestos, and found a sample mean of 193.2 bips, an

Ksivusya [100]

Answer:

a) Confidence interval is (182.86,203.54).

b) (i) Yes, 200 bips is a true mean as it lie in the interval.

(ii) No, 210 bips is not a true mean as it doesn't lie in the interval.

Step-by-step explanation:

Given : A researcher studied the radioactivity of asbestos. She sampled 81 boards of asbestos, and found a sample mean of 193.2 bips, and a sample standard deviation of 49.5 bips.

To find : (a) Obtain the 94% confidence interval for the mean radioactivity. (b) (i) According the interval that you got, is 200 bips a plausible value for the true mean? (ii) What about 210 bips?

Solution :

a) The confidence interval formula is given by,

$\bar{x}-z\times \frac{\sigma}{\sqrt{n}}$

We have given,

The sample mean $\bar{x}=193.2$ bips

s is the standard deviation $\sigma=49.5$ bips

n is the number of sample n=81

z is the score value, at 94% z=1.88

Substitute all the values in the formula,

$193.2-1.88\times \frac{49.5}{\sqrt{81}}$

$193.2-1.88\times 5.5$

$193.2-10.34$

$182.86$

Confidence interval is (182.86,203.54).

b) (i) According the interval $182.86$

200 bips a plausible value for the true mean as it lies in the interval.

(ii) 210 bips not lie in the confidence interval so it is not a true mean.

3 0

4 years ago

What is the area of a parallelogram whose verticles are A(-12, 2), B (6, 2), C(-2, -3), and D (-20, -3)?

Liono4ka [1.6K]

The area of the parallelogram will be 108 square units.

<h3>What is the area of the parallelogram?</h3>

The space occupied by any two-dimensional figure in a plane is called the area. The area of the outer surface of any body is called the surface area.

The vertices of the parallelogram are (x₁, y₁), (x₂, y₂), (x₃, y₃), and ( x₄, y₄).

Then the area of the parallelogram will be calculated as below:-

Area = 1/2 |[(x₁y₂ + x₂y₃ + x₃y₄+x₄y₁) - (y₁x₂ + y₂x₃ + y₃x₄+y₄x₁)]|

We have

(x₁, y₁) ⇒ (-12, 2)

(x₂, y₂) ⇒ (6, 2)

(x₃, y₃) ⇒ (-2, -3)

(x₄, y₄) ⇒ (-20 , -3 )

Then the area will be

Area = 1/2[{(-12) x (2) + (6) x (-3) + (-2) x (-3) + (-20 x 2 )} – {(2) x (6) + (2) x (-2) + (-3) x (-20) + ( -3 ) ( -12 )}]

Area = 108 / 2

Area = 54 square units.

Therefore, the area of the parallelogram will be 108 square units.

To know more about the area of parallelogram follow

brainly.com/question/970600

#SPJ1

8 0

2 years ago

Find cos (A).<br> Choose 1 answer:<br> A.) 35/12<br> B.) 12/37<br> C.) 35/37<br> D.) 12/35

Mama L [17]

Answer:

c.

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Wesly reads 60 pages in 20 minutes if he reads at the same constant rate what equation could represent this as a proportional re

sergey [27]

Answer:

let m be minutes, p be pages

pages read = times(in minutes) * reading speed(pages per minutes)

p=m*(60/20)

p=3m

For every increase of a minute of reading time, pages that Wesly have read will increase by 3

3 0

3 years ago

Y=5x² – 1 Please answer I need asap thank you!!