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anygoal [31]
2 years ago
6

If the sum of squares for a sample containing 51 items equals 200, what is the standard deviation?

Mathematics
1 answer:
Mashcka [7]2 years ago
7 0

The standard deviation is 1.98. Option A is correct.

The standard deviation formula is given as

  • \sigma = \sqrt{\frac{SS}{n} }

where:

  • SS is the sum of squares = 200
  • n is the sample size = 51

Substitute the given parameters into the formula to have:

\sigma = \sqrt{\frac{200}{51} }\\\sigma = \sqrt{3.922}\\\sigma = 1.980

Hence the standard deviation is 1.98

Learn more on standard deviation here: brainly.com/question/12402189

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Profit, P(x), is the difference between revenue, R(x), and cost, C(x), so P(x) = R(x) - C(x). Which expression represents P(x),
harkovskaia [24]

Answer:

x^4-3x^3+x^2-4

Step-by-step explanation:

Given the following functions

R(x) = 2x^4 – 3x^3 + 2x – 1 and

C(x) = x^4 – x^2 + 2x + 3

We are to find the profit function P(x)

P(x) = R(x) - C(x)

P(x) = 2x^4 – 3x^3 + 2x – 1 - ( x^4 – x^2 + 2x + 3)

P(x) = 2x^4 – 3x^3 + 2x – 1 - x^4 + x^2 - 2x - 3

Collect the like terms

P(x) = 2x^4-x^4-3x^3+x^2+2x-2x-1-3

P(x) = x^4-3x^3+x^2+0-4

P(x) = x^4-3x^3+x^2-4

Hence the required profit function P(x) is x^4-3x^3+x^2-4

5 0
3 years ago
Read 2 more answers
Someone help PLZ.
Novay_Z [31]

a and c i think

the blue circle is all the people who had brothers one name was in the blue circle so one person had a brother but the in between part of the too circles are who had both a brother and a sister so the is one name in the between purple  so you count that one to for brother and for sisters

there were  2 people that had brother

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and one that had both


3 0
3 years ago
I need help on 11<br> please
Alisiya [41]

▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪

Question 11 :

the equations are :

  • - 2x - 3y = 9

  • 4x + 6y =  - 18

now, let's graph the lines ~

As you can see in the attachment, The lines coincides each other, so the equations are :

  • consistent and dependent

5 0
2 years ago
Pls help ill give a 100 jusrt answer these question and ill even give brainliest
mojhsa [17]

Answer:

That is a lot of questions to answer. But I will try.

5)

a) 6 square units

b) 5/6

Second picture

1. Area = 6

2. Area = 4.5

3. Area = 20

4. Area = 9

5. Area = 17.5

Third picture

a) 8 units because if you move the bottom triangle to the top of the other triangle it makes a rectangle with height of 2 and length of 4.

I'm sorry I have to go I would love to finish this but I hope what I gave helps you!

8 0
3 years ago
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Which describes the collection of all points in the same plane that are 8 1/2 inches from Point T?
lukranit [14]

Answer:

circle T with radius 8 and 1/ 2 inches

Step-by-step explanation:

 

5 0
3 years ago
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