1) Consider two mutually exclusive events, G and H. Then, we have P(G | H) = _____.

Select one:

a.P(G)

b.P(G) / P(H)

c.0

d.P(H)

e.1

2) Which of the following is the F0.025 test statistic value for df1 = 5 and df2 = 7?

Select one:

a.3.97

b.4.88

c.5.29

d.6.85

e.6.88

3) Find the indicated value of standard normal variable Z, z.02.

Select one:

a.0.02

b.-0.02

c.-2.06

d.2.06

e.2.05

4) A researcher wants to determine the average income of the people of Omaha, Nebraska. He found that there are 385,600 employed people in the state. A group of 1,200 people are selected randomly to ascertain the income of each of those individuals. He finds that the average income of those 1,000 numbers to be $42,827. Identify the parameter in this context.

Select one:

a.385,600 employed people in Omaha

b.1,200 people selected for the study

c.Average income of $42,827

d.385,600 - 1,200 constitute the population

e.385,600 + 1,200 constitute the population

5) Find the probability, P(-2 < Z < 2) for a standard normal variable Z.

Select one:

a.0.9544

b.0.0228

c.0.5000

d.0.9772

e.0.0456

6) For a standard normal variable Z, which of the following z values satisfies the expression: P(Z < z) = 0.4840.

Select one:

a.0.32

b.0.04

c.0.68

d.-0.32

e.-0.04

7) A(n) _____ is a number that summarizes some aspect of the population as a whole.

Select one:

a.sample

b.population

c.statistic

d.parameter

e.estimator

8) A random variable X has the uniform distribution on the interval [0, 1]: the density function is f(x) = 1 if x is between 0 and 1, and f(x) = 0 for all other values of x. What is the probability that X assumes a value greater than 0.90?

Select one:

a.1.00

b.0.75

c.0.90

d.0.10

e.0.50

9) Which of the following is not a random variable?

Select one:

a.The amount of rainfall in September

b.Speed of light in a vacuum

c.The lifetime of a torch battery

d.Number of children in a family

e.Time required to run a mile

10) If X is a binomial random variable with parameters 10 and 0.3, then P(X 3) = _____.

Select one:

a.0.73

b.0.27

c.0.39

d.0.35

e.0.65