Complete the chart to find the mean, variance, and standard deviation. Remember to use commas and round numbers to the nearest tenth.
X
Х
X-X
(X-X)?
1. 45
= -357.5
The mean is
2.340
= -62.5
The variance is
3. 400
|=-2.5 =
The standard deviation is
4.825
= 422.5 =
n =
ΣΧ=
X=
EX - x)2 = 310,225.2

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3

1.3

step-by-step explanation:

3x2=6   9x+6

bring down the 6 on both sides

6+6=12

12= 9x

divide by 9

12/9 =

1.3 =x

well we know there are 4 clubs in 52 cards so it’s replaced so it should be 3/51

step-by-step explanation:

1st integer x

2nd integer x+1

3rd integer x+2

4th integer x+3

x+x+1 +x+2+x+3 =74

combine like terms

4x+6 = 74

subtract 6 from each side

4x = 68

x = 17

the integers are 17,18,19,20