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 what is the variance what is the standard deviation, rounded to the nearest whole number
a. Variance = 488,333.33, Standard deviation = 699
b. Variance = 416,666.67, Standard deviation = 645
c. Variance = 437,500, Standard deviation = 662
d. Variance = 420,000, Standard deviation = 648