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1 year ago

what are the extraneous variables eliminated by randomly selecting schools into the experiment and control groups?

1 answer:

6 0

Regression to the mean and selection bias are the superfluous variables that are removed by randomly choosing schools for the experiment and control groups.

A statistical phenomenon known as regression to the mean (RTM) states that if a random outcome of any measurement or event is severe in the first example, the second or following outcomes will be less extreme. In other words, it will be somewhat near to the distribution's mean or center.

According to regression to the mean (RTM), if an experiment's first result is extreme, the second result will be more in line with the population mean.

Decisions are made incorrectly as a result of this prejudice.

To mitigate the detrimental impacts of regression to the mean, organizations can exercise critical thinking and undertake a randomized controlled trial (RCT) with an experimental group and a control group.

Learn more about Regression :

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F(x) = x2 - x - 1<br> What is the average rate of change of f over the interval -1 < x < 1?

denpristay [2]

Answer:

-1

Step-by-step explanation:

The average rate of change is the ratio of the difference in y-values to the difference in x-values of corresponding points.

At x=-1, f(x) = (-1)^2 -(-1) -1 = 1

At x=1, f(x) = (1)^2 -(1) -1 = -1

So, points on the graph are (-1, 1) and (1, -1).

Then the change in y over that interval is -1 -1 = -2.

The change in x over that interval is 1 -(-1) = 2.

The average rate of change is ...

∆y/∆x = -2/2 = -1 . . . . average rate of change on (-1, 1)

5 0

4 years ago

Solve the equation. 5(x + 4) = 70 18 14 –6 10

skelet666 [1.2K]

Assignment: $\bold{Solve \ Equation: \ 5\left(x+4\right)=70}$

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Answer: $\boxed{\bold{x=10}}$

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Explanation: $\downarrow\downarrow\downarrow$

<><><><><>

[ Step One ] Divide Both Sides By 5

$\bold{\frac{5\left(x+4\right)}{5}=\frac{70}{5}}$

[ Step Two ] Simplify

$\bold{x+4=14}$

[ Step Three ] Subtract 4 From Both Sides

$\bold{x+4-4=14-4}$

[ Step Four ] Simplify

$\bold{x=10}$

<><><><><><><>

$\bold{\rightarrow Mordancy \leftarrow}$

6 0

3 years ago

A store makes earrings that cost $3.50 to make. Afterwards they mark up the price 400%. How much do they sell the earrings?

Kobotan [32]

Answer:

14 dollars

Step-by-step explanation:

To find the price, you multiply 3.50 with 400% or 4.00

3.50 x 4 = 14.00

4 0

3 years ago

Read 2 more answers

Help NO LINKS PLZ thx u.

andrey2020 [161]

Answer:

5, -5

Step-by-step explanation:

well 5-5 is 0 so that's it

:))))

6 0

3 years ago

Read 2 more answers

What is the estimate of 30 divided into 2

spayn [35]

15 even.

A good way to look at it is a clock. The 3 means 15 minutes and the 6 means 30 minutes.

6 divided by 3 = 2.

Hope this helps and makes sense!

4 0

4 years ago