What is the standard deviation of this data 10,12,8,2

Step-by-step explanation:

First you need to find the mean of the set so 10+12+8+2=32/4=8

Mean=8

Then subtract the mean of each number and square the result

10-8=2^2=4

12-8=4^2=16

8-8=0^2=0

2-8=-6^2=36

new data set: 0,4,16,36

Next find the mean of this set of data

0+4+16+36=56/4=14 now take the square root of that mean

sqrt14=3.74

Hope this helps

answer: evaluate the objective function at each vertex to determine which - and -values, if any, maximize or minimize the function. example: find the minimum value and maximum value of the objective function f ( x , y ) = 4 x + 5 y , subject to the following constraints

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."