What is deviation from mean

Answers

Answer 1

Answer: There's mean deviation and standard deviation.

Mean Deviation: The average distance to the mean.

Standard deviation = Square root of variance

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Standard deviation formula:

$\sigma =\sqrt { \frac { \Sigma { x }^( 2 ) }{ n } -{ \left( \frac { \Sigma x }{ n } \right) }^( 2 ) }$

Answer 2

Answer: action of departing from an established course or accepted standard.

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Frank increased his score on his English assignment from 12 points to 18 points

Answers

Frank increased his score by 6 points.
That was a 50% improvement.

Hey There!

Frank increased the score on his english assignment by 6 points, to find the answer subtract 18-12=6.

Thus, he changed his score by 6 points

Thank You!

Which one is taller 5 7/24 or 5 5/16

Answers

5/16 is bigger than 7/24 because if you get both of them to a common denominator you can see that 5/16 is clearly bigger.

5 5/16 is taller because of you divide 5 by 16 its a greater decimal than dividing 7 by 24

Find the sum of 3 consecutive even integers if the greatest odd integer is 2x

Answers

Let's assume you mean the greatest even integer is 2x.

That means the other two are 2(x-1) and 2(x-2) so the sum is

S = 2x + 2(x-1) + 2(x-2) = 2x + 2x - 2 + 2x - 4 = 6x - 6

Answer: 6x-6

The length of a rectangle is 4cm longer than the width. The perimeter is 80 cm. Find the length and width.

Answers

Length = l
Width = w
2l + 2w = 80cm

l+w = 40cm

l = w+4

w+4 + w = 40cm
2w + 4 = 40cm
2w = 36cm
w = 18cm
l = 22cm

A bag contains 5 yellow marbles, 7 pink marbles, and 3 purple marbles. Gordon selects a marble without looking. What is the probability that he selects a yellow marble or a purple marble?

Answers

5 + 7 + 3 = 15, so there are 15 marbles in the bag
There's a 5/15 chance of a yellow marble
There's a 3/15 chance of a purple marbe
Add them up
8/15 chance of a yellow or purple marble

Answer:

the awnser is 8/15 because of 5+3=8

Step-by-step explanation:

5+7+3=15

8/15

What is the substitution method?

Answers

The method of solving "by substitution" works by solving one of the equations (you choose which one) for one of the variables (you choose which one), and then plugging this back into the other equation, "substituting" for the chosen variable and solving for the other. Then you back-solve for the first variable

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