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Question
A recent study showed that the length of time that juries deliberate on a verdict for civil trials is normally distributed with a mean equal to 12.56 hours with a standard deviation of 6.7 hours. Given this information, what is the probability that a deliberation will last between 10 and 15 hours?
A) Approximately 0.29
B) Nearly 0.75
C) About 0.48
D) About 0.68
Answer
This answer is hidden. It contains 17 characters.
Related questions
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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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Q:
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Q:
When developing a confidence interval estimate, the confidence level is calculated based on the size of the sample and the population standard deviation.