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This is an open-book exam. You may refer to your text and other course materials as you work on the exam, and you may use a calculator. You must complete the exam individually. Neither collaboration nor consultation with others is allowed. It is a violation of the UMUC Academic Dishonesty and Plagiarism policy to use unauthorized materials or work from others.
Answer all 20 questions. Make sure your answers are as complete as possible. Show all of your supporting work and reasoning. Answers that come straight from calculators, programs or software packages without any explanation will not be accepted. If you need to use technology (for example, Excel, online or hand-held calculators, statistical packages) to aid in your calculation, you must cite the sources and explain how you get the results.
Record your answers and work on the separate answer sheet provided.
This exam has 200 total points; 10 points for each question.
Fitting of multiple linear regression equation - Give a list of the model assumptions for a regression model.
A communication network transmits binary digits, 0 to 1, where each digit is transmitted 10 times in succession. During each transmission, there is a 0.995 probability of accurate transmission.
With mean 120 mmHg and standard deviation 20 mmHg. The mean systolic blood pressure for the sample was 126 mmHg. How likely is it that the results of this sample occurred?
Sketch the appropriate distribution, and locate the critical region for a = 0.05.
If the store orders three copies of the magazine, what is the mean value of the profit? (Profit = Revenue - Cost). If the store orders four copies of the magazine, is it better to order four than three copies of the magazine. Explain.
Use these statistics to construct a 94% confidence interval for the mean monthly consumption for the population of all Ontario households.
explain how various factors determine the width of confidence intervals. indicate how changes in these factors affect
The probabilities .9 and .1 respectively. Give the probability distribution for daily sales. Find the mean and standard deviation of the daily sales.
The theoretical probability of undesirable side effects resulting from taking Grebex is 2 in 19. If 570 people take Grebex to lower their blood pressure, how many will encounter undesirable side effects?
How would you choose an appropriate level of significance for your statistical test? What are the possible outcomes and limitations of your statistical test?
1. describe the data that are collected for an independent-measures t test and the hypotheses the test evaluates.2.
American food will cause an increase in weights. Use the .01 significance level. A random sample of 11 international students is chosen for the study. What is your conclusion?
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