When the only sources of variation in a production process are caused by chance, the process is said to be …


19) A multiple-choice test has 20 questions. There are four choices for each question. A student comes to class with four different colored balls of identical shape and size in her pocket. She has decided to draw one ball from her pocket per question and allow the color of the ball to select the answer for each question. What type of probability distribution can be used to figure out her chance of getting 10 questions right?

A. Hypergeometric
B. Poisson
C. Normal
D. Binomial

20) Which of the following cannot generate a Poisson distribution?

A. The number of people at a movie theatre on Friday evening
B. The number of customers arriving at an automatic teller machine (ATM) in a minute
C. The number of defects in a new automobile
D. The number of goals in the World Cup soccer game

21) Which of the following is a characteristic of every binomial distribution?

A. Each outcome is dependent on the previous outcome.
B. The probability of success increases from trial to trial.
C. Each outcome is mutually exclusive.
D. The outcome of the trial depends on the number of trials.

22) The average qualifying speed for a championship NASCAR® race is 145.65 mph and the standard deviation is 9.45 mph. Only drivers who obtain z-scores greater than 1.2 will qualify for the race. If the speeds are normally distributed, what minimum speed must be clocked to compete for the trophy?

A. 146.9 mph
B. 155.2 mph
C. 157.0 mph
D. 174.8 mph

23) Trudy Jones recently completed her certification examination and learned that her z-score was -2.5. The examining board also informed her that a failure to pass would equal all scores that were one or more standard deviations below the mean and that those with scores higher than two standard deviations above the mean would receive a special commendation award. Trudy can conclude that she

A. failed the exam
B. needs more data to determine if she passed the exam
C. passed the exam and will receive a special commendation award
D. passed the exam, but no commendation award is forthcoming

24) The use of the student’s distribution requires which of the following assumptions?

A. The sample size is greater than 30.
B. The population variance is known.
C. The population is normal.
D. The sample is drawn from a positively skewed distribution.

25) The standard error of the sample mean is equal to 5 when n=25. If the sample size increases by a factor of four, how will the standard error change?

A. It will be double.
B. It will be cut in half.
C. It will be cut to 1/4 of 5.
D. It will quadruple.

26) For a sample size of 1, the sampling distribution of the mean will be normally distributed

A. regardless of the shape of the population
B. only if the shape of the population is positively skewed
C. only if the population values are larger than 30
D. only if the population is normally distributed

27) A 95% confidence interval for the population mean indicates that

A. with an infinite number of samples, there’s a 5% chance that the population mean will be outside the interval
B. more sampling is required to increase the confidence interval to 100%
C. the sampling process is biased
D. 95% of the observations from any sample will fall within the interval

28) A random sample of 16 ATM transactions at the First National Bank of Flintrock revealed a mean transaction time of 2.8 minutes with a standard deviation of 1.2 minutes. The width, in minutes, of the 95% confidence interval for the true mean transaction time is

A. ± 0.639
B. ± 0.588
C. ± 0.300
D. ± 2.131

29) All other things being equal, which is narrower, a 95% confidence interval with n=100 or a 99% confidence interval with n=30?

A. The 95% confidence interval
B. The 99% confidence interval
C. The same width
D. Need the margin of error to tell

30) When the only sources of variation in a production process are caused by chance, the process is said to be

A. out of balance but under control
B. out of control but in balance
C. under control
D. out of control

Paper Assignments
Calculate your paper price
Pages (550 words)
Approximate price: -

Why Work with Us

Top Quality and Well-Researched Papers

We always make sure that writers follow all your instructions precisely. You can choose your academic level: high school, college/university or professional, and we will assign a writer who has a respective degree.

Professional and Experienced Academic Writers

We have a team of professional writers with experience in academic and business writing. Many are native speakers and able to perform any task for which you need help.

Free Unlimited Revisions

If you think we missed something, send your order for a free revision. You have 10 days to submit the order for review after you have received the final document. You can do this yourself after logging into your personal account or by contacting our support.

Prompt Delivery and 100% Money-Back-Guarantee

All papers are always delivered on time. In case we need more time to master your paper, we may contact you regarding the deadline extension. In case you cannot provide us with more time, a 100% refund is guaranteed.

Original & Confidential

We use several writing tools checks to ensure that all documents you receive are free from plagiarism. Our editors carefully review all quotations in the text. We also promise maximum confidentiality in all of our services.

24/7 Customer Support

Our support agents are available 24 hours a day 7 days a week and committed to providing you with the best customer experience. Get in touch whenever you need any assistance.

Try it now!

Calculate the price of your order

Total price:

How it works?

Follow these simple steps to get your paper done

Place your order

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.

Our Services

No need to work on your paper at night. Sleep tight, we will cover your back. We offer all kinds of writing services.


Essay Writing Service

No matter what kind of academic paper you need and how urgent you need it, you are welcome to choose your academic level and the type of your paper at an affordable price. We take care of all your paper needs and give a 24/7 customer care support system.


Admission Essays & Business Writing Help

An admission essay is an essay or other written statement by a candidate, often a potential student enrolling in a college, university, or graduate school. You can be rest assurred that through our service we will write the best admission essay for you.


Editing Support

Our academic writers and editors make the necessary changes to your paper so that it is polished. We also format your document by correctly quoting the sources and creating reference lists in the formats APA, Harvard, MLA, Chicago / Turabian.


Revision Support

If you think your paper could be improved, you can request a review. In this case, your paper will be checked by the writer or assigned to an editor. You can use this option as many times as you see fit. This is free because we want you to be completely satisfied with the service offered.