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Q1) ATM machine was installed at Hunter Industries for exclusive use of Hunter's employees.
Union Bank desired to evaluate percentage of all employees which used the machine at least twice in last month. From a arbitrarily chosen sample of 100 employees, 45 did use ATM at least twice. Use this information to make a 95% confidence interval evaluating percentage of all employees that use machine at least twice per month.
Q2) Assume you are interested in evaluating proportion of San Diegans between ages of 18 and 40 who are able to buy a home in San Diego metropolitan area, where median home price just reached $716,000. You would like to evaluate the proportion with 90% confidence and margin of error of 3%. How many San Diegans between 18 and 40 years old would you require to arbitrarily sample to evaluate this correctly?
Q3) Office manager for large company is studying usage of its copier machines. Random sample of 6 of its machines revealed the following number of copies made in one day: 826 931 1,126 918 1,011 and 1,124. Use this information to make a 95% confidence interval to evaluate true average number of copies made each day at this company.
Multiple comparison procedures are going to be done using the Bonferroni method with = 0.05. The value of t** is 2.4667. Which of the following is the appropriate conclusion from carrying out these multiple comparisons?
Perform a posthoc test that is suitable if we assume that group 7 is a control group and that the other are different treatment groups and that we are only interested in finding significant treatments, not to compare them.
Using the EMV criteria (you wish to maximize expected profits in this case) determine what course of action that Optel should take. Make sure to state the best strategy in words.
It has been claimed that women live longer than men; however, men tend to be older than their wives. Ages of sixteen husbands and wives from England were obtained. These data should be analyzed with a
What is the approximate estimated bootstrap standard error of the median, What is the approximate bias of the median estimated from bootstrapping - What is the bootstrap t confidence interval for the median
Determine a 95% confidence interval for the population mean.
Karefree State University has an enrollment of 18,000. Researchers took a sample of 900 and found 477 students wanted a Field Hockey team. Construct the 95% and 99% Interval estimates for the population proportion.
To test whether the population standard deviation differ significantly using Chi-Square test.
Suppose the population standard deviations are not the same. At.05 significance level, is there a difference in mean waiting time?
The random variable X has which of the following probability distributions and What is the probability that no student wins
Calculate the mean and standard deviation of the following data sets, then produce a five number summary and box plot of data.
Makers of generic drugs are required to demonstrate that their generic drug does not differ significantly from the "reference" drug it is intended to imitate.
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