Help with a few questions?

Question

http://prntscr.com/dxku0x

Answer 1

34)

Step 1:

The variance of the sequence

Consider,

Find the Mean value.

Substitute

Find the Variance.

General form of variance is

Substitute

Solution:

The variance of the data is

Answer 2

35)

Step 1:

The variance of the sequence

Consider,

Find the Mean value.

Substitute 

Find the variance.

General form of variance is

Substitute 

Solution:

The variance of the data is

Answer 3

36)

Step 1:

The variance of the sequence 

Consider,

Find the Mean value.

Substitute 

Find the variance.

General form of variance is

Substitute 

Find the standard deviation.

General form of the standard deviation is 

Find the standard deviation.

General form of the standard deviation is

Substitute

Solution:

The standard deviation of the data is