Statistics - Standard Deviation and Variance - II

The mean of first n natural number is

• $\frac{n}{2}$

• $\frac{\left(n+1\right)}{2}$

• $n$

• none of these

Tags

CCSS.8.EE.C.7B

The mean of first ten even natural number is

• 11

• 10

• 12

• 9

Tags

CCSS.HSS.ID.A.2

CCSS.HSS.MD.A.2

The standard deviation of 15 observations is 6 and if each item is decreased by 1, then standard deviation will be

• 5

• 7

• 9

• 6

Tags

CCSS.HSS.ID.A.2

The standard deviation of the observations 5, 5, 5, 5, 5 is

• 0

• 5

• 20

• 25

If the variance of the data 2, 4, 5, 6, 17 is v, then what is the variance of the data 4, 8, 10, 12, 34?

• v

• 2v

• 3v

• 4v

Tags

CCSS.HSS.ID.A.2

What is the value of n for which the numbers 1, 2, 3, 4, .., n have variance 2?

• 4

• 5

• 6

• 8

Tags

CCSS.8.EE.A.2