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A recent survey of 50 executives who were laid off from their previous position revealed it took a mean of 26 weeks for them to find another position. The standard deviation of the sample was 6.2 weeks. Construct a 95 percent confidence interval for the population mean. Is it reasonable that the population mean is 28 weeks? Justify your answer.
Create a 90% confidence interval for proportion of all kernels that would not pop.
Suppose each employee in the company receives a $3000 raise for next year (each employee's salary is increased by $3000). The interquartile range of the salaries will
If 25 men aged 18-24 are arbitrarily chosen, determine probability that their mean serum cholesterol level is between 165 and 200.
In addition, record the values for the UCL, center line, and LCL. Also, record any points that are out of control. Use a z-value of three.
At the 5% significance level, if the sample proportion is .45, and the standard error of the sample proportion is .035, the appropriate conclusion would be:
Test the hypothesis that there is no difference in the mean scores of Exam 1 and Exam 2 against the alternative that the average is greater for the second exam.
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
At α = .05, is there a difference in variances? Illustrate all steps clearly, including the illustration of the decision rule.
Compute the variance and standard deviation
What is the P-value of the test, assume the standard deviation is 3 years, a 95% confidence interval for the average time
Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
The Wilcoxon signed rank statistic, The mean for the Wilcoxon signed rank test and The P-value for the Wilcoxon signed rank test
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