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Citrus Rental is a popular car rental agency that has a history of having too few cars available, so that its available cars are overdriven.
Suppose that research doctors wish to know if penicillin is an effective treatment for ulcers. They plan to search hospital records for patients with ulcers
What is the Bonferroni correction? When is it used? What is the principle of the Bonferroni correction?
Develop two different Research Question and Two or different Statement of Hypothesis - verbal for the data set provided
What hypothesis testing procedure would you use in the following situations? Explain your reasons, including assumptions and limitations
Using numerical data from one of the data sets available through the "Data Sets" link on your page, develop one business research question
Discuss the process of the hypothesis testing and the outcome. Give feedback and highlight two areas of significance. Give pros and cons of the hypothesis
For a sample of 12 items from a normally distributed population for which the standard deviation is s=17.0, the sample mean is 230.8
Using statistical terms explain, what does "individual packages of cereal may weigh slightly more or less than the marked weight due to normal variation
Using the data derived from the M&M experiment in class develop one research question from which you will formulate a research hypothesis.
A restaurant claims that its speed of service time is less than 18 minutes. A random selection of 36 service times was collected, and their mean
Conduct a hypothesis test for a single population mean of a quantitative variable equal to a given number.
A regional commuter airline selected a random sample of 25 flights and found that the correlation between the number of passengers and the total weight
I measure writing ability in 4th year students at Cosmopolitan and compare those measures with those of 1st year students. What is my Null Hypothesis?
A random sample of 51 observations was selected from a normally distributed population. The sample mean was x = 88.6 , and the sample variance
Consider the Mission Valley Power Company (MVP), which has over 6000 customers. In response to a request from the Michigan Public Utilities Commission
Use a 0.05 significance level to test the claim that for the runners in the New York City marathon, men and women have ages with different amounts of variation.
Lists times (in seconds) that animated children's movies show tobacco use and alcohol use. The 50 times of tobacco use have a mean of 57.4 sec
The owner of Britten's Egg Farm wants to estimate the mean number of eggs laid per chicken. A sample of 20 chickens shows they laid an average of 20 eggs
To encourage telephone efficiency, a catalog call center issues a guideline that at least half of all telephone orders should be completed within 2 minutes.
A study by the Investment Company Institution (ICI) in 2004, which randomly surveyed 3,500 households and drew upon information from the IRS
The wall street journal reported 28% of people who bank online have cut back on their internet use
A major issue facing many states is whether to legalize casino gambling. Suppose the govenor of one state believes that more than 55% of the state's registered
The director of a state agency believes that the average starting salary for clerical employees in the state is less than $30,000 per year.
Provide the relevant critical value for each of the following circumstances: