1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
GarryVolchara [31]
1 year ago
12

A contractor records the areas, in square feet, of a small sample of houses in a neighborhood to determine data about the neighb

orhood. they are: 2,400; 1,750; 1,900; 2,500; 2,250; 2,100 which of the following represents the numerator in the calculation of variance and standard deviation? (225)2 (–425)2 (–275)2 (325)2 (75)2 (–75)2 = 423,750 (650)2 (–150)2 (–600)2 (250)2 (150)2 (–300)2 = 980,000 (250)2 (–400)2 (–250)2 (350)2 (100)2 (–50)2 = 420,000 what is the variance? what is the standard deviation, rounded to the nearest whole number?
Mathematics
1 answer:
Sedbober [7]1 year ago
8 0

Option c is the correct answer which represents the numerator in the calculation of variance and standard deviation.

<h3>What are the variance and standard deviation?  </h3>

In statistics, variance is a measure of the variation of data from the mean, whereas standard deviation is the measure of the normal distribution of statistical data.

A contractor records the areas, in square feet, of a small sample of houses in a neighborhood to determine data about the neighborhood.

2,400; 1,750; 1,900; 2,500; 2,250; 2,100

we need to find which of the following represents the numerator in the calculation of variance and standard deviation.

(225)^{2} + (–425)^{2}+ (–275)^{2} + (325)^{2} + (75)^{2}+ (–75)^{2} = 423,750

(650)^{2} + (–150)^{2} + (–600)^{2} + (250)^{2} + (150)^{2} + (–300)^{2} = 980,000

(250)^{2} + (–400)^{2} + (–250)^{2} + (350)^{2} + (100)^{2} + (–50)^{2} = 420,000  

92416.60

The variance is 84000

The standard deviation is 290

mean = (2400+1750+1900+2500+2250+2100)/6

mean = 2150

Subtract the data values from the mean to get

2400-2150 = 250

1750-2150 = -400

1900-2150 = -250

2500-2150 = 350

2250-2150 = 100

2100-2150 = -50

The differences are 250, -400, -250, 350, 100, -50

Then you square those values and add up the squares

(250)^2 +  (-400)^2 +  (-250)^2 +  (350)^2 +  (100)^2 +  (-50)^2 = 420,000

Hence, option c is the correct answer which represents the numerator in the calculation of variance and standard deviation.

Learn more about variance;

brainly.com/question/14116780

You might be interested in
NEED HELP PLS FOR BOTH!!!
Kipish [7]
39/500 needs to be multiplied by 15, which results in 585/500. This is 1.17 as a decimal. 191/200 in diameter needs to be multiplied by 8, which equals 1528/200. This is 7.64 as a decimal.
4 0
3 years ago
The map distance from Dodgetown to Kidville is 2.75 cm. Find the actual distance from Dodgetown to Kidville.
Fantom [35]

The answer is:

55 km (a)



7 0
3 years ago
Read 2 more answers
Find the coefficient of the x^3 in the expansion of (2x-9)^5
il63 [147K]

Use the binomial theorem:

\displaystyle (2x-9)^5 = \sum_{k=0}^5 \binom5k (2x)^{5-k}(-9)^k = \sum_{k=0}^5 \frac{5!}{k!(5-k)!} 2^5 \left(-\frac92\right)^k x^{5-k}

The <em>x</em> ³ terms occurs for 5 - <em>k</em> = 3, or <em>k</em> = 2, and its coefficient would be

\dfrac{5!}{2!(5-2)!} 2^5 \left(-\dfrac92\right)^2 = \boxed{6480}

8 0
3 years ago
Yx*2; use x=7,And y=2
Lyrx [107]

Answer:

28

Step-by-step explanation:

First you plug in your x, and y to get (2)(7)*2

Then you just have to times them all together and you get 2*7=14 then 14*2=28

6 0
3 years ago
Plzz give an example <br><br> how do you round to the nearest cubic
elixir [45]
round you volume measure to a whole number. like if it was 80.4 it would be 80
8 0
3 years ago
Read 2 more answers
Other questions:
  • 5.4x10^2/1.2x10^-1<br><br> Scientific Notation
    10·1 answer
  • What is 1,000 divided by 38
    14·1 answer
  • What is the area of a rectangular prism with a width of 15 in, height of 3 in, and a length of 4 in? I need help :( I'm doing a
    12·1 answer
  • Help me please, and example
    14·1 answer
  • Find the slope of the line.Enter your answer in simplist form (4,2) (1, -4)
    8·1 answer
  • Find the degree of 2x7 y+4x9 -9y
    7·1 answer
  • Answer both 5 and 6 and i will give brainlyest
    10·2 answers
  • Australia is 2.97 x 106 square
    10·1 answer
  • Given that secA = 13/5, what is the value of cosA​
    9·1 answer
  • Ali bought 212 pounds of ground turkey at $2.50 per pound and ​ 314 ​pounds of ground beef at $3.20 per pound.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!