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An average of 5 cars arrive per hour at a restaurant. Assume that the number of cars arriving per
hour follows Poisson distribution.
(i) What is the probability that exactly 5 cars will arrive in a given hour ?
(ii) What is the probability that at least 3 cars arrive in a given hour ?
(iii) What is the probability that at most 3 cars arrive in a given hour ?
The President of the American Insurance Institute wants to compare the yearly costs of auto insurance offered by two leading companies.
American youngsters aged 6 to 19, 15% were seriously overweight. Calculate and interpret a confidence interval using a 99% confience level for the proportion of all american youngsters.
A study sponsored by American Express Co. and the French government tourist office found that old American stereotypes about French unfriendliness weren't true.
Is this sample sufficient to conclude that the eye spots have a significant influence on the birds behavior? Use a two tail test with alpha =.05. Compute the estimated Cohen's d to measure the size of the treatment.
Calculate estimated Cohen's d to measure size of treatment effect.
Construct a 95% confidence interval estimate for the population proportion of airline travelers who think that the airline fee that is most unreasonable is additional charges to redeem point/miles.
Please identify a research question that can be addressed with a hypothesis test. An example might be to identify the presence of bacteria in a batch of milk.
Selection of a location for a prospective Wal-Mart creates many questions for executives. A suitable site would be one that has an adequate demand for Wal-Mart offerings, sufficient transportation resources, and an available labor force.
a. What is the probability that one randomly selected student scores above 1100 on the GRE? b. Describe the sampling distribution of the sample mean for the 16 students.
Create a 90% confidence interval for the true average number of unoccupied seats per flight. interpret this interval in the context of the problem.
Each of the given z-scores, draw the normal distribution and sketch the vertical line at location of z-score, then find out whether body is to right or the left of line and determine the proportion in the body.
Mean and standard deviation for new sample were then computed to be M _ 6 and s _ 3. Write down the values of mean and standard deviation for original sample?
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