The following table is the frequency distribution for the amount 'screen time' (in hours) had each day by 50 employees at a large, multinational corporation. Screen time is loosely defined as time spent using a computer, tablet, gaming console, television, or smart phone.

Screen TimeFreq0

x

<

4

0x<4

154

x

<

8

4x<8

188

x

<

12

8x<12

1312

x

<

16

12x<16

4

Are these population or sample data?Select an answer

Sample

Population

Use the table above to make the following calculations. Round solutions to three decimal places, if necessary.

Mean =

Variance =

Standard Deviation =