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marta [7]
2 years ago
5

Which formula is used to calculate the standard deviation of sample data?​

Mathematics
2 answers:
Reptile [31]2 years ago
8 0

Answer:

Standard deviation (S) = square root of the variance

Standard deviation is the measure of spread most commonly used in statistical practice when the mean is used to calculate central tendency. Thus, it measures spread around the mean

Step-by-step explanation:

abruzzese [7]2 years ago
6 0

Answer:

Its A., the first one on edge 2020

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(x +y)(x-y), ifx= -3, y=-5
Rufina [12.5K]

Answer:

-16

Step-by-step explanation:

(-3 + (-5))(-3 - (-5))

(-3 - 5)(-3 + 5)

(-8)*2

<u>-16</u>

5 0
3 years ago
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Help me please i’m failing lol
nalin [4]

16) k=176 hope you get to a point were your not failing

6 0
2 years ago
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tatyana61 [14]

Answer:

????

Step-by-step explanation:

4 0
2 years ago
I would like to know if I am solving correctly so far and what I do after this to continue solving.
12345 [234]
\bf A=\cfrac{13\cdot 3\sqrt{3}}{2}\implies A=\cfrac{39\sqrt{3}}{2}
4 0
3 years ago
Solve the equation by completing the square. 0=4x^2-72x
Butoxors [25]

Answer:

Step-by-step explanation:

First we need to make sure that the leading coefficient is a 1.  Ours is a 4, so we need to factor it out, leaving us with

4(x^2-18x)=0

To complete the square, take half the linear term, square it, then add it to both sides.  But don't forget about that 4 hanging around out front, refusing to be ignored.  Our linear term is 18.  Half of 18 is 9, and 9 squared is 81.  Add 81 into the parenthesis, but what we REALLY added in was 4*81 which is 324:

4(x^2-18x+81)=324

To solve this, we need to get the x terms all by themselves.  So let's divide both sides by 4 to get

x^2-18x+81=81

The process of completing the square created a perfect square binomial on the left.  We will state this binomial now:

(x-9)^2=81

We isolate the x term by taking the square root of both sides:

x - 9 = ±9

From that we have 2 equations:

x - 9 = 9 and x - 9 = -9

Which means that x = 18 or x = 0

6 0
3 years ago
Read 2 more answers
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