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A retailer finds that the demand for a very popular board game averages 100 per week with a standard deviation of 20. If the seller wishes to have adequate stock 95% of the time, how many of the games must she keep on hand.
About 68% of the students at fairview community college favor a new policy regarding parking on campus. suppose that we are interested in the proportion of 45 students in a math class who favor the policy.
What can we say about the probability distribution of x? Is it approximately normal? What are the mean and standard deviation?
Use this information to set up a 90 percent confidence interval for the proportion, p of all US workers who play hooky.
Calculate GM's Altman Z-Score. Show your calculations. Based on your calculations, would you agree or disagree with Lutz that GM is over the worst? Explain in detail.
Given sample data arranged in a frequency distribution table. Use Excel to calculate the sample mean and variance from this data set.
Develop a 95% confidence interval of the difference between the daily population means for the two airports.
Standard deviation was increased to 40, determine the overall effect on their society? Would this change be a good thing?
Calculate P value? Calculate critical value?
Assume that results of survey were used to create seperate 99% confidence intervals for boys and girls. would the margins of error be same as, larger , or smaller than that for question one?
Compute a 95% confidence interval for the average time spent in training per year at this firm. Develop a graph showing the data below as a frequency distribution. Note the mean and the confidence interval on the graph.
What is the underlying variable that indirectly correlates these 2 variables? What other variables could you identify as having an indirect relationship?
In the construction of confidence intervals, if all other quantities are unchanged, an increase in the sample size will lead to a ____________ interval.
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