All categories

2 years ago

Me pueden ayudar? Yo no entiendo nada :(

Mathematics

1 answer:

V125BC [204]2 years ago

4 0

yo tampoco :( pero pone lo que sea lo siento trate de poner 890 pero creo que ya las hkgsxv gfubi Yu hiuvv bien va vuub que n20 vuvkboonni 80? hjohgdw

You might be interested in

What type of quadrilateral has to the vertices A(3,6), B(3,3), C(6,3), and D(6,6)

prisoha [69]

a square as the distance between the lengths and widths are 3

8 0

3 years ago

A simple random sample of items resulted in a sample mean of . The population standard deviation is . a. Compute the confidence

Varvara68 [4.7K]

Answer:

(a): The 95% confidence interval is (46.4, 53.6)

(b): The 95% confidence interval is (47.9, 52.1)

(c): Larger sample gives a smaller margin of error.

Step-by-step explanation:

Given

$n = 30$ -- sample size

$\bar x = 50$ -- sample mean

$\sigma = 10$ --- sample standard deviation

Solving (a): The confidence interval of the population mean

Calculate the standard error

$\sigma_x = \frac{\sigma}{\sqrt n}$

$\sigma_x = \frac{10}{\sqrt {30}}$

$\sigma_x = \frac{10}{5.478}$

$\sigma_x = 1.825$

The 95% confidence interval for the z value is:

$z = 1.960$

Calculate margin of error (E)

$E = z * \sigma_x$

$E = 1.960 * 1.825$

$E = 3.577$

The confidence bound is:

$Lower = \bar x - E$

$Lower = 50 - 3.577$

$Lower = 46.423$

$Lower = 46.4$ --- approximated

$Upper = \bar x + E$

$Upper = 50 + 3.577$

$Upper = 53.577$

$Upper = 53.6$ --- approximated

So, the 95% confidence interval is (46.4, 53.6)

Solving (b): The confidence interval of the population mean if mean = 90

First, calculate the standard error of the mean

$\sigma_x = \frac{\sigma}{\sqrt n}$

$\sigma_x = \frac{10}{\sqrt {90}}$

$\sigma_x = \frac{10}{9.49}$

$\sigma_x = 1.054$

The 95% confidence interval for the z value is:

$z = 1.960$

Calculate margin of error (E)

$E = z * \sigma_x$

$E = 1.960 * 1.054$

$E = 2.06584$

The confidence bound is:

$Lower = \bar x - E$

$Lower = 50 - 2.06584$

$Lower = 47.93416$

$Lower = 47.9$ --- approximated

$Upper = \bar x + E$

$Upper = 50 + 2.06584$

$Upper = 52.06584$

$Upper = 52.1$ --- approximated

So, the 95% confidence interval is (47.9, 52.1)

Solving (c): Effect of larger sample size on margin of error

In (a), we have:

$n = 30$ $E = 3.577$

In (b), we have:

$n = 90$ $E = 2.06584$

Notice that the margin of error decreases when the sample size increases.

4 0

2 years ago

Let set C = {even numbers between 1 and 99} and set D = {numbers between 1 and 150 that are evenly divisible by 10}.

Alex

$C=\{2;\ 4;\ 6;\ 8;\ ...;\ 98\}\\\\D=\{10;\ 20;\ 30;\ 40;\ 50;\ 60;\ ...;\ 140\}\\\\C\ \cap\ D=\{10;\ 20;\ 30;\ 40;\ 60;\ 70;\ 80;\ 90\}\\\\Answer:\boxed{A}$

4 0

3 years ago

PLEASE HELP FASTTTTTT

balandron [24]

The answer would be C because if you have a total amount of money or 29,668.75$ then it would be X amount of home edition and Y amount of business edition
So 23.50X + 58.75Y = 29,668.75$
therefore causing
X+Y=745

8 0

2 years ago

What is A drawing that is a smaller representation of a real object is called a ___ drawing.

vladimir2022 [97]

Answer:

Scale Drawing

Step-by-step explanation:

Scale : The relationship between the measurements on drawing object and the measurements of a real object is called scale of the drawing.

Scale Drawing : A drawing that is used to represent an object that is too large or too small in to be drawn at actual size. So, to draw or represent these these type of objects we use a scale factor and the associated drawing is called Scale Drawing.

Hence, A drawing that is a smaller representation of a real object is called a Scale Drawing.

7 0

2 years ago

Read 2 more answers