A chemical company sells a specialized industrial lubricant in 20 liter containers. A random sample of the latest production lot shows the contents of 10 containers to be 20.62, 20.33, 19.76, 19.85, 20.67, 20.31, 20.64, 19.81, 19.5, and 20.35 liters. Find the standard deviation of the sampled containers’ contents. A. σ=0.55
B. σ=0.38
C. σ=0.40
D. σ=0.53

i believe that the answer is

b. y-1=-2(x-4)

hope this !

66.666666667%

step-by-step explanation:

divide 150 by 100

divide 100 by 1.5

there you go!

decreased by 33.333333334%

proportions are fractions that equal to each other. so if two fractions are the same, they are proportional.

let's check the answers to see if they are proportional.

question a is not proportional because you can't turn 1.5/3 to 3/9. if you try to multiply 1.5/3 by 2 or 3, you wont get 3/9. it's impossible to make the fractions the same.

question b is not proportional because you can't turn 22/33 to 4/6. 33 can't go into 6.

question c is proportional because when you multiply 2 and 3 by 71, you would get 142/213, and those fractions equal to each other

question d is proportional because when you divide 14 and 7 by 2, you would end up with 7/3.5, and those fractions equal to each other.