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A senior accounting major at Midsouth State University has job offers from four CPA firms. To explore the offers further, she asked a sample of recent trainees how many months each worked for the firm before receiving a raise in salary. The sample information is: Number of months before first raise in salary
CPA Inc. AB Intl. Acct. Ltd. Pfisters12 14 18 1210 12 12 1414 10 16 1612 10
At the .05 level of significance, is there a difference in the mean number of months before a raise was granted among the four CPA firms?
Find the mean, median, mode, sample variance, and range. Do you think that this sample might have come from a normal population? Why or why not?
Brief description of the real-world situation or problem you selected to address, the independent and dependent variables you would study
To forcast the sample size within 0.02 with 90 percent confidence. The CEO of the organization needs to forcast the proportion of Canadians who own their house.
A computer software developer would like to use the number of downloads (in thousands) for the trial version of his new shareware to predict the amount of revenue
Find the probability that among 8 randomly selected graduates, at least one finds a job in his or her chosen field within a year of graduating.
A sample of twenty automobiles was taken, and the miles per gallon (MPG), horsepower, and total weight were recorded. Develop a linear regression model to predict MPG using horsepower as the only independent variable. Develop another model with weig..
In a bumper test, three types of autos were deliberately crashed into a barrier at 5mph, and the resulting damage (in dollars) was estimated. Five test vehicles of each type were crashed, with the results shown below. Are mean crash damages the sa..
In a randomized, double-blind, placebo-controlled trial of children, echinacea was tested as a treatment for upper respiratory infections in children.
In a few sentences, describe two designs that can address your research question. The designs must involve two different statistical analyses.
Compute the standard error of the mean O(funny o with line) line over x, for sample sizes of 50, 100, 15o, and 200. What can you say about the size of the standard error of the mean as the sample size is increased?
If you are performing a hypothesis test using a z statistic in which you sampled 50 people and found an average SAT verbal score of 542 (assume we know the population mean to be 500 and the standard deviation to be 100)
Find a 95% confidence interval for the population mean concentration of uric acid in this patients blood. What is the margin of error?
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