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For the following managerial dilemmas, formulate a research problem and plan, the findings of which will aid the decision maker. Make sure you (a) define your variables-independent, dependent, and mediating or intervening if relevant, (I) hypotheses or questions to be answered, (c) model, (d) your basic data analysis strategy-what groups you will compare, or correlate which variables.
SJFC is considering increasing the role of hybrid/blended courses in its graduate programs (MBA included). Alternatives to hybrid courses are complete online courses or traditional courses. Concerns have been raised by faculty with regard to learning rigor in such courses, as well as satisfactory out-of-class help for students. On the other hand convenience is an important factor. Some have argued that the type of program or subject matter of the particular course can also make a difference.
Write the claim as a mathematical sentence. Stating the null and alternative hypotheses, and identify which represents the claim.
A particular candidate claims she has the support of at least 60% of the voters in her district. A random sample of 150 voters yields 87 who support her.
A meteorologist wishes to estimate the mean amount of snowfall per year in Spokane, Washington. A random sample of the recorded snowfalls for 20 years from a 140 year period produces a sample mean equal to 54.03 inches, with a standard deviation of 9..
Given that the price-to-earnings ratios are uniformly distributed, answer the following questions. What percent of price-to-earnings ratios are between 1.90 and 2.48?
For the most recent year available, the mean annual cost to attend a private university in the United States was $20,182. Assume the distribution of annual costs follows the normal probability distribution and the standard deviation is $4,400.
Determine the probability, using binomial distribution, of obtaining 4 or more nonconforming units when sampling 30 computers from batch known to be 10% nonconforming.
Construct a frequency distribution and construct a histogram for the following data and use seven intervals, starting with 30-39.
Using the 0.10 level of significance, is there evidence that the population mean is above $300?
What is the approximate permutation test P-value and What is the permutation test P-value for testing the equality of the means versus the hypothesis that the mean change for the treatment group is larger than the mean treatment for the control gro..
A student wanted to construct a 95% confidence interval for the average age of students in her statistics class. She randomly selected 9 students. Their average age was 19.1 years with a standard deviation of 1.5 years. What is the best point esti..
The quality control manager at a lightbulb factory needs to determine whether the mean life of a large shipment of lightbulbs is equal to the specified value of 375 hours.
Assume that the amount your town's population grows every year is fixed or constant. Utilize your equation in part b to approximate the population in the year 2030.
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