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ABC auto insuraance classifies drivers as good, medium, or poor risks. Drivers who apply fall under these three groups in proportations: 30 percent, 50 percent and 20. The probability of a good driver having a accident is .01, probability of a medium driver having a accident is .03 and the probability of a poor driver having a accident is .10. The company sells Mr. Brophy an insurance policy and he has an accident. What's the probability of Mr. Brophy being a good, medium or poor driver?
With a single-sample t ratio, the null hypothesis states that:
I scheduled three calls for a particular day, and each call has a probability of 0.5 of making a sale. What are his probabilities of making (a) three sales, (b) two or more sales, (c) no sales?
Computing the probability values using normal distribution - The data set has a bell-shaped distribution. Between what two prices do 68% of the houses lie?
Evolutionary theories often, Emphasize that humans have adapted to their physical environment. One such theory hypothesis that:
Construct a 95 percent confidence interval for the population proportion of positive drug tests. May you assume that this is a normal distribution? Explain why.
Would it be reasonable to conclude that the population distribution is Poisson with a mean of 2.0?
Follow the conventions as described in the general guidelines for writing up Special Problems.
If the confidence interval limits do not include age below 20 does it mean that motor cyclists under the age of 20 rarely die in crashes?
Inspect table produced in question 2 above. Comment on relative sensitivity of minimum sample size to actual proportion and to desired half width.
At the 0.05 level of significance, is there evidence to suggest that the population mean waiting time to check out is less than 10.73 minutes?
The margin of error for a sample size 25 is +-3. Will the margin of error be greater or less if the sample size is 400? What is the new margin of error?
The Atlanta Convention & Visitors Bureau just released a report on the percentage of available hotel rooms in Fulton County that were rented (occupied) in 2003.
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