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A coin-operated drink machine was designed to discharge a mean of 6 ounces of coffee per cup. In a test of the machine, the discharge amounts in 14
For a random sample of 12 observations, the sample mean was 407 and the sample standard deviation 6. Using the .01 significance level:
A. is this a one-or two- tailed test? B. what is the decision rule? C. what is the value of the test statistic? D. what is your decision regarding H¥ï
Individual scores of a placement examination are normally distributed with a mean of 84.2 and a standard deviation of 12.8.
There is an advantage in stating the hypothesis both in the null and in the alternative; it adds clarity to our thinking of what we are testing. Explain.
There are four levels of measurement, two are numeric and two are attribute data. This first time around, try to identify if a question produces a number
Proving that a population mean is not 150. Use an alpha of 5% and set up the full, detailed, five step hypothesis test.
Mutual funds have become an increasing popular investment alternative for smaller investors. To help investors decide on the particular fund
When we reject the null hypothesis, we are certain that the null hypothesis is false? Yes or No?
A maintenance supervisor is comparing the standard version of an instrunctional booklet with one that has claimed to be superior
Which of these measurement scales (nominal, ordinal, interval and ratio) can be handled through hypothesis testing?
Example of a real-world situation or problem addressing the independent and dependent variables study; that includes a research question; the statistical
Some defendants in criminal proceedings plead guilty and are sentenced without a trial, whereas others who plead innocent are subsequently
The p-value approach was to be used. A sample of size 49 gave a sample mean of 508. Given that s = 30 2, and a = 0.01, find the p-value
Alternative Hypothesis: If an individual has 12 or more years of education their salaries will be higher.
In Meijer supermarket, the customer's waiting time to check out is approximately normally distributed with a standard deviation of 2.5 minutes.
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