# Category: IC82 STATISTICS – 08

## IC82 STATISTICS – 08

Que. 1 : Q1) For practical and mathematical reasons, the number of independent variables included in a multiple regression model should be relatively small, preferably nor more than _______________.

1.  a) Four to Five

2.  b) Six to Seven

3.  c) Seven to Eight

4.  d) Eight to Nine

Que. 2 : Q2) What is defined as a collection of some but not all the elements of a population and a sample is a part or portion of the Population chosen for investigation?

1.  a) Census

2.  b) Sample

3.  c) Population

4.  d) Probability

Que. 3 : Q3) Which of the following are important Mathematical Properties of Variance?

1.  a) For any Constant C, Variance of C = 0:σ^2(C)  = 0.

2.  b) For any random variable X, variance is non-negative:σ^2(X)  ≥ 0

3.  c) For any constant addition C, to any random variable X:σ^2(C+X) =σ^2(X)

4.  d) All of the above

Que. 4 : Q4) The OC Curve is not probability density function. Say whether True or False.

1.  a) True

2.  b) False

3.

4.

Que. 5 : Q5) Which of the following are Non-probability sampling methods?

1.  a) Convenience Sampling

2.  b) Judgement Sampling

3.  c) Quota Sampling

4.  d) All of the above