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musickatia [10]
2 years ago
8

x-6sinx-1=0" align="absmiddle" class="latex-formula">
Please help!!
Thank you!
Mathematics
1 answer:
seropon [69]2 years ago
6 0
<h3> <em>Answer;</em></h3>

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<em>like </em><em>my </em><em>answer </em><em>and </em><em>brainliest</em>

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A researcher studying the sleep habits of teens will select a random sample of n teens from the population to survey. The resear
kati45 [8]

Answer:

D. The center remains constant, and the area in the tails of the distribution decreases.

Step-by-step explanation:

Hello!

Be it two independent random variables, X~N(μ;σ²) and U~Xₙ², the variable t is determined by the quotient between a random variable N(0;1) and the square root of a Chi-Square variable divided by its degrees of freedom:

t= \frac{(X-Mu)/Sigma}{\sqrt{U/n} }

As a consequence of this, the structure of the distribution depends on the parameter n (degrees of freedom), it is centered in zero and has a bell-shape similar to the normal distribution.

It has a mean and variance:

E(t)= 0 for n > 1

V(t)= \frac{n}{n - 2} n > 2

As you can see the variance of the distribution is directly affected by its degrees of freedom, which means that when the degrees of freedom change, the variance of the distribution change and so does its shape.

When ↑n ⇒ ↑V(t) ⇒ The area under the tails increases.

When ↓n ⇒ ↓V(t) ⇒ The area under the tails decreases.

In this example, the degrees of freedom of the distribution decreased from 40 to 20, then the variance of the distribution decreases and it "flattens", i.e. the area under the tails gets lowered.

The E(t) isn't affected by the modification of n, so the distribution remains centered in zero.

I hope this helps!

6 0
2 years ago
Layna can paint a 350-square foot room in 4 hours. It takes Bebe 7 hours to paint the same room. Which equation can be used to f
levacccp [35]
1/4+1/7=t
I am 99% sure this is correct. Good luck
4 0
2 years ago
Two math questions plz
lord [1]

we know that

<u>The correlation coefficient</u> is a measure of linear association between two variables. Values of the correlation coefficient are always between −1 and +1.

Using a mathematical tool-------> Excel software

Find the correlation coefficient

see the attached table N 1 and N 2

the answer is

Part 1) The correlation coefficient of the data is 0.02

Part 2) The correlation coefficient of the data is 0.98

3 0
2 years ago
Help will mark brainliest
Otrada [13]

Answer:

Blue square

Step-by-step explanation:

looking like rhombus because right angle is 90 degrees and a square has 4 right angles

6 0
3 years ago
Read 2 more answers
Suppose the mean of four test scores is 70. To answer the why or why not, giving an example or counterexample is an option.
Dvinal [7]

Answer:

a). Yes

We can have multiple values above or below 70that can still sum up to 280

b).yes, if all numbers are 70.

C).no, all numbers can not be below 70.

The sum will not be equal to 280 again

D). Yeah.it is

This is possible if the numbers can still balance up to 280.

Step-by-step explanation:

Given the mean to be 70 generally.

And total of the score =70*4

Total score = 280.

A). It's possible that the scores none are 70.

We can have values like 69,68,72,71

The above numbers can still give a meam of 70

And a total of 280.

B). It's possible

The test score can be all same if the scores are all 70.

It will still give total of 280 and mean of 70

C). It's not possible

Imagine the numbers are all 69,69,69,69.

Just number below 70 for the four of them will give us total of 276

And a mean below 70.

D). Yeah it is possible

The possibility occurs when the remaining number out of the four is way below 70.

Example.

20, 80,100,80

The sum of the above= 280

Mean = 70

8 0
3 years ago
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