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

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2