QuestionQuestion 1 of 250.0/ 1.0 PointsFor a boxplot, the vertical line inside the box indicat

11 May QuestionQuestion 1 of 250.0/ 1.0 PointsFor a boxplot, the vertical line inside the box indicat

Question
Question 1 of 25

0.0/ 1.0 Points

For a boxplot, the vertical line inside the box indicates the location of the

A.median

B.mode

In C.mean

D.inter quartile range

Answer Key:

Part 2 of 9 – 2.0/ 2.0 Points

Question 2 of 25

1.0/ 1.0 Points

If events A and B are mutually exclusive, then the probability of both events occurring simultaneously is equal to

A.0.5

B.1.0

C.any value between 0.5 and 1.0

D.0.0

Answer Key:

Question 3 of 25

1.0/ 1.0 Points

If P(A) = P(A|B), then events A and B are said to be

A.complementary

B.mutually exclusive

C.exhaustive

D.independent

Answer Key:

Part 3 of 9 – 3.0/ 3.0 Points

Question 4 of 25

1.0/ 1.0 Points

Suppose that 50 identical batteries are being tested. After 8 hours of continuous use, assume that a given battery is still operating with a probability of 0.70 and has failed with a probability of 0.30.

What is the probability that greater than 40 batteries will last at least 8 hours?

A.0.0789

B.0.4538

C.0.9598

D.0.0402

Answer Key:

Question 5 of 25

1.0/ 1.0 Points

If a gambler rolls two dice and gets a sum of 10, he wins $10, and if he gets a sum of three, he wins $20. The cost to play the game is $5. What is the expectation of this game?

A.$3.06

B.-$2.78

C.-$3.06

D.$2.78

Answer Key:

Question 6 of 25

1.0/ 1.0 Points

There are two types of random variables, they are

A.real and unreal

B.exhaustive and mutually exclusive

C.complementary and cumulative

D.discrete and continuous

Answer Key:

Part 4 of 9 – 5.0/ 6.0 Points

Question 7 of 25

1.0/ 1.0 Points

The theorem that states that the sampling distribution of the sample mean is approximately normal when the sample size n is reasonably large is known as the:

A.simple random sample theorem

B.central tendency theorem

C.point estimate theorem

D.central limit theorem

Answer Key:

Question 8 of 25

1.0/ 1.0 Points

The normal distribution is:

A.a binomial distribution with only one parameter

B.a discrete distribution

C.a density function of a discrete random variable

D.the single most important distribution in statistics

Answer Key:

Question 9 of 25

1.0/ 1.0 Points

If Z is a standard normal random variable, then the value z for which P(-z < Z < z) equals 0.8764 is

A.1.16

B.0.3764

C.1.54

D.3.08

Answer Key:

Question 10 of 25

1.0/ 1.0 Points

Given that Z is a standard normal random variable, P(-1.0 < Z < 1.5) is

A.0.9332

B.0.0919

C.0.7745

D.0.8413

Answer Key:

Question 11 of 25

0.0/ 1.0 Points

One reason for standardizing random variables is to measure variables with:

A.different means and standard deviations on a non-standard scale

B.dissimilar means and similar standard deviations in like terms

In C.similar means and standard deviations on two scales

D.different means and standard deviations o