A contractor records the areas, in square feet, of a small sample of houses in a neighborhood to
determine data about the neighborhood. 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
COMPLETE
What is the variance?
What is the standard deviation, rounded to the nearest whole number?

First : C, Variance:  84,000 , Standard deviation: 290

Step-by-step explanation:

i took the test

it is C;84000;290

Step-by-step explanation:

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

What is the variance?  

92416.60

⇒ 84000

What is the standard deviation, rounded to the nearest whole number?  

290

1/4 because there is 4 grades.