Variance and standard deviation. Round to the nearest tenth

6.3

Step-by-step explanation:

To find the variance, you want to find the mean of the data.

Next, you find the difference between the data point and the mean.

6-5=1

1-5=-4

9-5=4

5-5=0

6-5=1

2-5=-3

6-5=1

With the differences, we square them and find the mean.

1²=1

(-4)²=16

4²=16

0²=0

1²=1

(-3)²=9

1²=1

44/7=6.3

step-by-step explanation:

in simplified version   it would be x ≤-4

step-by-step explanation:

multiply each term in x ≤-4 by -1