Question

QUESTION 1

The expected value of a discrete random variable is:

A)The mean

B)The standard deviation

C) The probability of success

D) The variance

QUESTION 2

Expected value is:

A)A measure of dispersion

B) A measure of central location

C)A measure of distance from the mean

D)None of the above

QUESTION 3

In combinations,

A)n represents the number of objects, x represents multiply

B)n represents nothing, x represents the number of elements

C)n represents the total number of objects, x represents the number of objects we want to select out of the total.

D)None of the above

QUESTION 4

When calculating factorials,

A)0! = 1

B)0!=0

C)0!=2

D)0!=3

  

QUESTION 5

When calculating factorials:

A)1!=0

B)1!=1

C)1!=2

D)1!=3

QUESTION 6

Seven factorial is:

A)7*6*5*3

B)7*6*5*4

C)7*6*5*4*3

D 7*6*5*4*3*2*1

QUESTION 7

In the binomial probability distribution, p is the probability of success. What letter represents the probability of failure?

A)n

B)o

C)p

D)q

QUESTION 8

q is the probability of failure in a binomial probability distribution. We can calculate q as:

A)1-p

B)1-x

C)1-q

D)None of the above

QUESTION 9

In the binomial distribution, the mean is the expected value and is represented by mu. We calculate it as:

A)E(x)=nq

B)E(x) = np

C)E(x) = npq

D)E(x)=square root of n p q end root

QUESTION 10

In the binomial distribution, the formula for the variance is:

A)npq

B)np

C)square root of n p q end root

D)None of the above

Answer 1