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A study has been carried out to compare the United Way contributions made by clerical workers from three local corporations. A sample of clerical workers has been randomly selected from each firm, and the dollow amounts of their contributions are as follows:
Firm1 Firm2 Firm3199 108 162236 104 86167 153 160263 218 135254 210 20796 201
a. What are the null and alternative hypotheses for this test?
b. Use ANOVA and the 0.05 level of significance in testing the null hypothesis identified in part (a).
The owner was interested in the mean time required to service this model, and decided not to carry the model if the mean repair time appeared to be more than 40 minutes.
Use the population standard deviation along with the sample mean, S, and find a 92% confidence interval for the population mean. Is the true population mean contained in this interval?
Carry out the ANOVA and, if essential, post-hoc comparisons. Make a graph to represent group differences, and interpret ANOVA in a paragraph written in APA style.
What is the 95% confidence interval estimate of the population mean cost for a prescription of Zocor?
Below are two data sets. Using descriptive statistics, discuss the two data sets in relation to each other. Both data sets come from an operation where potato chips are being placed in small connivance store bags that are to hold 6.0 oz.
At the .01 significance level can we conclude the mean age is more than 8.4 years for the cars of university students? What is the p-value?
Construction of frequency distribution table for the given continuous data.
The economists in the Obama administration suggested that the stimulus package that they recommended in early 2008 would keep unemployment under eight percent.
Based on the information in part (a), what decision should the director make about the books used for the courses if the goal is to keep the cost below $300?
A business journal investigation of the performance and timing of corporate acquisitions discovered that in a random sample of 2,863 firms, 848 announced one or more acquisitions during the year 2000.
Drawing the standard normal curve and indicating the area representing the probability and
Using WSJ or IBD look up the following stocks: General Electric, General Motors, Microsoft and Intel and answer the following questions for each stock. You may have to refer to several issues of your newspaper for all of the information if the pap..
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