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Is sentence Independent of Plea? Many people believe that criminals who plead guilty tend to get lighter sentences than those who are convened in trials. The accompanying table summarizes randomly selected sample data for San Francisco Defendants in burglary cases. All of the subjects and prior prison sentences. Use a 0.05 significance level to test the claim that the sentence is independent of the plea. IF you were an attomey defending a guilty defendant, would these results suggest that you should encourage a guilty plea?
Guilty Plea
Not Guilty Plea
Sent to prison
392
58
Not Sent to prison
564
14
At the .05 significance level, is there a difference in the mean number of miles traveled per month between Cincinnati and Pittsburgh employees? Use the five-step hypothesis-testing procedure.
An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of two emails per hour. Suppose the arrival of these emails is approximated by the Poisson distribution.
If the amount of cosmic radiation to which a person is exposed while flying by jet across the US is a random variable having the normal distribution with µ=5.35 mrem, and σ = 0.59 mrem.
Do these data suggest a statistically significance difference between the proportions of drug-resistant cases in the two states? Use a 0.02 level of significance and computed value of 2.37.
Developing a linear programming problem using Commuter Bus scheduling to minimize the total cost.
The following study was developed by Economist Simon Fass. Fass surveyed a sample population of low-income households in St. Martin. The variables analyzed were monthly income per adult and choice of rental contract for housing.
Set up hypotheses and test to find out whether or not population variance is larger than $100.
Calculate expected value for each decision and choose the best one. Find out how much firm would be eager to pay to a market research firm to gain better information about future market conditions.
Give an example of a hypothesis test. State what the Null and the Alternative hypotheses.
Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
One of the major measures of the quality of service provided by any organization is the speed with which responds to customer complaints. A large family-held department store selling furniture and flooring, including carpet, had undergone a major ..
How large a sample should be taken if the desired margin of error is?
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