**STA301 Quiz Statistics**

Question # 1

A discrete probability function f(x) is always:

Select correct option:

Zero

One

Negative

Non-negative

Question # 2

If f(x) is a continuous probability function, then P(X = 2) is:

Select correct option:

1

0

1/2

2

Question # 3

The range of the binomial distribution is:

Select correct option:

0, 1, 2, ………… 100

0, 1, 2, ………… n

0, 1, 2, ………… x

1,2, …………….n

Question # 4

In which of the following situations binomial distributions is approximate to normal distribution?

Select correct option:

n = 50, p = 0.01

n = 500, p = 0.001

n = 100, p = 0.05

n = 50, p = 0.02

Question # 5

The location and shape of the normal curve is (are) determined by:

Select correct option:

Mean

Variance

Mean & variance

Mean & standard deviation

Question # 6

A random experiment has five outcomes in its sample space {s1, s2, s3, s4, s5}. If P(s1)=0.2,P(s2)=0.3, P(s3)=0.1 and P(s4)=0.2 then P(s5)=?

Select correct option:

1

0.2

0.8

0.5

Question # 7

The joint density function f(x,y) will be a pdf if

Select correct option:

Both of integrals f(x,y) dx dy =1

Both of integrals f(x,y) dx dy >1

Both of integrals f(x,y) dx dy <1

Both of integrals f(x,y) dx dy =0

Question # 8

Which of the following is correct property for joint probability distribution of X and Y:

Select correct option:

Sigma f(X,Y)=1

Sigma f(Y,X)=1

Both of above

None of above

Question # 9

A random variable that can assume every possible value in an interval [a, b]:

Select correct option:

Discrete variable

Continuous variable

Qualitative variable

Categorical variable

Question # 10

Normal approximation to the binomial distribution is used when:

Select correct option:

np>5

nq>5

Both of the above

None of the above