Question

find the variance and standard deviation of the wages of 9 workers given below ₹310,₹290,₹320,₹280,₹300,₹290,₹320,₹310,₹280​

Answer 1

Answer:

Variance =  222.22

Standard Deviation = 14.9

Step-by-step explanation:

₹310,₹290,₹320,₹280,₹300,₹290,₹320,₹310,₹280​

n = 9

Sum = 310 + 290 + 320 + 280 + 300 + 290 + 320 + 310 + 280 = 2700

Mean = 2700/9 = 300

∑(x - Mean)² = 10² + 10² + 20² + 20² + 0 + 10² + 20² + 10² + 20²

= 2000

Standard Deviation = √(2000)/9  = 14.9

Variance = 2000/9  = 222.22