Statistics MCQS for NTS Set 4

Var (ax + b ) is:

a² var (x) + b

Zero

a var (x) – a²

a² var (x)

If E (X) =4, then find arithmetic mean will be:

8

1

0

4

If x – 0,1,2,P(x) = k,2k,3k then k is

1/6

1/8

1/9

1/4

If a pair of dice is rolled then the sample space consists of outcomes

6

36

24

12

Set of electronic instruction is

Ouput device

Hardware

None of these

Software

The systematic arrangement of data in the form of rows and columns is called

Classification

Data array

Row and column cations

Tabulation

A fair coin is tossed four times the prob.of getting four heads is:

1/2

1/4

1

1/16

If constants are added to or subtracted from the values of the variable the value of r is

Zero

Negative

Remain unchanged

Positive

The probability of sure event is

Less than one

Negative

Zero

One

Weight of earth is:

Qualitative variable

Difficult to tell)

Continuous Variable

Discrete Variable