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Assume that classroom has 10 light bulbs. Probability that each individual light bulb works is 0.6. Assume that each light bulb works independently of other light bulbs. Determine the probability that all 10 of light bulbs work?
Is the normal distribution (or its special case, the standard normal distribution) effective in characterizing situations and/or in helping managers make decisions?
Consider you have completed a survey of employees working in a call center doing customer service for a major manufacturing company.
A normal population has an average of 80 and a standard deviation of 10. You select a sample of 25. Calculate the probability that the sample mean
When a researcher has two samples with two means, one of the assumptions for two samples is independence of between the two samples. What does this mean? What happens if the independence assumption is violated?
Arbitrarily choose someone from sample. Determine the probability that they are Jewish and Democrat?
From the above function, it can be said that the expected yearly income of and find the multiple coefficient of determination
From the given probability distribution finite the mean and standard deviation.
Suppose it has been determined that the average number of customers waiting for service is 1.929. There are two servers. Determine:
According to the Internal Revenue Service, the mean tax refund for the year 2007 was $ 2,708. Assume the standard deviation is $ 650 and tha the amounts refunded follow a normal probability distribution.
Compute the appropriate test statistic to test Ho: p = 80/100 vs. Ha: p > 80/100.
Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
Use the hypergeometric formula to find this probability. The lottery commission also pays if a contestant matches 4 or 5 of the 6 winning numbers. Hint: Divide the 44 numbers into two groups, winning numbers and nonwinning numbers.
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