All categories

4 years ago

Variance is_________.

Mathematics

1 answer:

katrin [286]4 years ago

3 0

Answer:

Step-by-step explanation:

Variance can be said to be a measure of dispersion for a random sample.

Variance = pq/n

When given the variance, we can find the standard deviation.

Standard deviation = √variance

= √pq/n

You might be interested in

Simplify using trigonometric identities<br> 2sinθ - sin2θ cosθ

Anit [1.1K]

Double angle identity for sine:

$\sin(2x) = 2 \sin(x) \cos(x)$

$\implies 2 \sin(\theta) - \sin(2\theta) \cos(\theta) = 2 \sin(\theta) - 2 \sin(\theta) \cos^2(\theta)$

Factorize the left side.

$2 \sin(\theta) - 2 \sin(\theta) \cos^2(\theta) = 2 \sin(\theta) \left(1 - \cos^2(\theta)\right)$

Pythagorean identity:

$\cos^2(x) + \sin^2(x) = 1$

$\implies 2 \sin(\theta) \left(1 - \cos^2(\theta)\right) = 2 \sin^3(\theta)$

so that

$\boxed{2 \sin(\theta) - \sin(2\theta) \cos(\theta) = 2 \sin^3(\theta)}$

8 0

2 years ago

Find three consecutive numbers whose sum equals<br>999.

mina [271]

Answer:

332, 333, 334

Step-by-step explanation:

First, we acknowledge that the equation that we need to solve will be "x+(x+1)+(x+2)=999" This is because x represents the smallest of three consecutive numbers whose sum is 999. Simplifying this equation will leave us with 3x+3=999 which is simplified further to 3x=996 and again simplified to x=332. X is the smallest number of the three.

4 0

3 years ago

17+36=z-37 what is z

sp2606 [1]

Answer:

The correct answer is 90

Step-by-step explanation:

17 + 36= z- 37 ADD 17 AND 36

53= z-37 BRING 37 OVER TO 53 AND ADD

z = 90 FINAL ANSWER

8 0

3 years ago

Jamie was using fabric for Christmas gifts. Her fabric is 59 inches long. Using all the fabric, how long would each piece be if

nikklg [1K]

Answer:

8.428

Step-by-step explanation:

59 divided by 7

4 0

3 years ago

Need help with this question regarding functions. :)

Tanzania [10]

The Y-intercept is found when X is equal to 0.

In the table, when X is 0, f(x) is 1.

On the graph, when X is 0 the line crosses at Y = 1.

This means that they are equal.

The answer would be equal to.

4 0

4 years ago