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3 years ago

Plz help me plz I am begging you plz I need your help pls pls I need your help I swear I need the help from you guys

Mathematics

1 answer:

Makovka662 [10]3 years ago

7 0

Answer:

Step-by-step explanation:

D shows that 6 is being multiplied by n. Because of the order of operations, we d this first. Then we'd subtract 4.

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What is the value of the digit 6 in 18.06?

Crank

Answer:

hundredths

Step-by-step explanation:

5 0

3 years ago

Which is the sum of -4 and its additive inverse?

Aneli [31]

Answer:

-4 +4 =0

Step-by-step explanation:

The sum of a number and its' additive inverse is 0

The additive inverse of -4 is 4

-4 +4 =0

3 0

3 years ago

Read 2 more answers

In a recent year, Washington State public school students taking a mathematics assessment test had a mean score of 276.1 and a s

Oksi-84 [34.3K]

Answer:

a) $\mu_{\bar x} =\mu = 276.1$

$\sigma_{\bar x} =\frac{\sigma}{\sqrt{n}}=\frac{34.4}{\sqrt{64}}=4.3$

b) From the central limit theorem we know that the distribution for the sample mean $\bar X$ is given by:

$\bar X \sim N(\mu=276.1, \frac{\sigma}{\sqrt{n}}=4.3)$

c) $P(\bar X \geq 285)=P(Z\geq \frac{285-276.1}{4.3}=2.070)$

$P(Z\geq2.070)=1-P(Z$

Step-by-step explanation:

Let X the random variable the represent the scores for the test analyzed. We know that:

$\mu=E(X) = 276.1 , \sigma=Sd(X) = 34.4$

And we select a sample size of 64.

The central limit theorem states that "if we have a population with mean μ and standard deviation σ and take sufficiently large random samples from the population with replacement, then the distribution of the sample means will be approximately normally distributed. This will hold true regardless of whether the source population is normal or skewed, provided the sample size is sufficiently large".

Part a

For this case the mean and standard error for the sample mean would be given by:

$\mu_{\bar x} =\mu = 276.1$

$\sigma_{\bar x} =\frac{\sigma}{\sqrt{n}}=\frac{34.4}{\sqrt{64}}=4.3$

Part b

From the central limit theorem we know that the distribution for the sample mean $\bar X$ is given by:

$\bar X \sim N(\mu=276.1, \frac{\sigma}{\sqrt{n}}=4.3)$

Part c

For this case we want this probability:

$P(\bar X \geq 285)$

And we can use the z score defined as:

$z=\frac{\bar x -\mu}{\sigma_{\bar x}}$

And using this we got:

$P(\bar X \geq 285)=P(Z\geq \frac{285-276.1}{4.3}=2.070)$

And using a calculator, excel or the normal standard table we have that:

$P(Z\geq2.070)=1-P(Z$

8 0

3 years ago

Anyone? i dont understand

Murljashka [212]

Answer:

1725ft^2

Step-by-step explanation:

Hi!

First you have to find your two bases B1 and B2, which are 50 and 65.

Then you find the height, which is 30ft.

Finally, you plug those into the equation 1/2*h*(B1+B2) and solve.

1/2*30*(50+65)

1/2*30*(115)

15*115

1725ft^2 is your answer.

I hope this helps!

8 0

3 years ago

You are having a pizza-making party. You will need 6 ounces of dough and 4 ounces of sauce for each person at the party (includi

Len [333]

Answer:

Gyeyuegtee2ugt2egt2fekufwetuifkueyr2v4xtk63ur Gyeyuegtee27gt2egt2fwk7fwet7ifkue6r2v4ftk63 trviugrxrt6uk3 gtyr7ix txyt 4t ulu66tt xflut I r t4e1ttrxl86vt4tt6tr63t3r6te3y2tyewdgydgey3dgyywgewsyfwdgy

7 0

3 years ago