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devlian [24]
3 years ago
9

X+3x+4+3 what is the answer

Mathematics
1 answer:
Airida [17]3 years ago
3 0
4x+7 is the answer...........
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A simple random sample of 100 observations was taken from a large population. The sample mean and the standard deviation were de
olga2289 [7]

Answer:

Se=1.2

Step-by-step explanation:

The standard error is the standard deviation of a sample population. "It measures the accuracy with which a sample represents a population".

The central limit theorem (CLT) states "that the distribution of sample means approximates a normal distribution, as the sample size becomes larger, assuming that all samples are identical in size, and regardless of the population distribution shape"

The sample mean is defined as:

\bar X =\frac{\sum_{i=1}^n x_i}{n}

And the distribution for the sample mean is given by:

\bar X \sim N(\mu,\frac{\sigma}{\sqrt{n}})

Let X denotes the random variable that measures the particular characteristic of interest. Let, X1, X2, …, Xn be the values of the random variable for the n units of the sample.

As the sample size is large,(>30) it can be assumed that the distribution is normal. The standard error of the sample mean X bar is given by:

Se=\frac{\sigma}{\sqrt{n}}

If we replace the values given we have:

Se=\frac{12}{\sqrt{100}}=1.2

So then the distribution for the sample mean \bar X is:

\bar X \sim N(\mu=80,Se=1.2)

5 0
2 years ago
A box contains orange balls and green balls. The number of green balls is six more than four times the number of orange balls. I
Delvig [45]
This is your answer

3 0
2 years ago
X – y = 2<br>3x + y = 10<br><br>all of yalls answer r wrong the answer is x= 3 and y= 1 ​
Y_Kistochka [10]

Answer:

Step-by-step explanation:

People always get it wrong just for points

3 0
3 years ago
Simplify the following rational expression.
AlekseyPX

Step-by-step explanation:

\frac{6 {x}^{3} }{15 {x}^{4} - 60x ^{3}  }  \\  \\  =  \frac{6 {x}^{3} }{3 {x}^{3} (5 {x}- 20 )} \\  \\ =  \frac{2 }{5 ({x}- 4 )}, \:  \: x \neq \: 4\\  \\

x = 4 makes the expression undefined.

Because at x = 4 denominator becomes zero, which makes the expression undefined.

7 0
3 years ago
What is the Pythagorean Theorem?
Genrish500 [490]

Answer:

a squared plus b squared=c squared. The answer is A.

Step-by-step explanation:

Hope I helped!

Please mark Brainliest!!!

8 0
2 years ago
Read 2 more answers
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