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Question
The number of customers who enter a bank is thought to be Poisson distributed with a mean equal to 10 per hour. What are the chances that 2 or 3 customers will arrive in a 15-minute period?
A) 0.0099
B) 0.4703
C) 0.0427
D) 0.0053
Answer
This answer is hidden. It contains 17 characters.
Related questions
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The sample data do not provide sufficient evidence to conclude that more than 55 percent of the population favor legalized gambling.
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The director of a state agency believes that the average starting salary for clerical employees in the state is less than $30,000 per year. To test her hypothesis, she has collected a simple random sample of 100 starting clerical salaries from across the state and found that the sample mean is $29,750. Assuming the population standard deviation is known to be $2,500 and the significance level for the test is to be 0.05, what is the critical value (stated in dollars)?
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When developing a confidence interval estimate, the confidence level is calculated based on the size of the sample and the population standard deviation.