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Regulators have found that 23 of the 68 investment companies that filed for bankruptcy in the past five years failed because of fraud, not for reasons related to the economy. Suppose that nine additional firms will be added to the bankruptcy rolls during the next quarter. How many of those failures are likely to be attribute to fraud?
Describe a specific application of statistics that either has a direct effect on you or your life.
Estimate with 90% confidence the difference in the level of satisfaction with service between the two branches.
Find a 95% confidence interval for the mean amount of money µ spent at the waiter's tables.
What kinds of plots are useful in data screening? What can you do if your data do not meet the assumptions of your statistic?
The Greenberg public hearing meeting turned stormy. Citizens from four suburbs were gathered at city hall to try to get the city's federal funds for their own suburbs. The government recently awarded $750,000 to the city for road improvements. The..
Using decision tree analysis, decide whether Jay must proceed with his law suit against manufacturer.
Country A and Country C spends about the same amount on average per person per year. Which has the greater spread?
Using ANOVA summary table, find out if regression model is significant.
To give 98% confidence interval for population mean μ, you would use critical value.
At 5% level of significance, is true mean smaller than specification? Clearly mention your hypotheses and decision rule.
a) What statistical test should be used to analyze these data? b) Identify H0 and Ha for this study. c) Conduct the appropriate analysis d) Should H0 be rejected? What should the researcher conclude?
By using the age midpoints x and the percentages of nurses, do we have a valid probability distribution? Describe.
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