What is the first error he made in computing the standard deviation?

a. yuri failed to find the difference between each data point and the mean.

b. yuri divided by n instead of n -1.

c. yuri did not subtract 9 - 14 correctly.

d. yuri failed to square -2 correctly.

Step-by-step explanation:

Given is a sample with 4 items as

12,9,14,21

Mean = average of 4 = 14

s is the square root of sample variance

Sample variance is the sum of squares divided by n-1

But Yuri divided by 4 = n instead of 3 = n-1

That is the only mistake he did and all other steps are right.

in the attachment.   i didn't see your choices.   the word which means there is choices.

step-by-step explanation:

(x,y)

x tells you how much left or right you go from the origin

y tells you how much down or up you go from the origin

so for example (-3,2), you go left 3 and up twice. i denoted which of the ordered pairs is which in my graph.

overpriced

step-by-step explanation: