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For a particular company, the number of sick days used by employees had a mean of 7 and a standard deviation of 2.
a. A random sample of 100 employees is to be taken and the mean number of days of sick leave taken is to be calculated. Find the approximate probability that the sample mean will have a value larger than 4.9.
b. Suppose that the number of days of sick leave taken by employees has a distribution that is skewed right. Does this new information change your answer in (part a)? WHY?
c. After the implementation of a program, the company took a random sample of 100 employees and noticed that the average number of sick days taken is less than 4.9. What would you say about the program? (In order to receive credit, your answer should incorporate continuous probability estimates that would justify your answer.)
Consider a Poisson probability distribution with 2 as the average number of occurrences per time period. Write the appropriate Poisson probability function.
The fleet of yellow fire trucks made 135,035 runs and had 4 accidents. At α = .01, did the yellow fire trucks have a significantly lower accident rate?
Although this critique was later discarded, how does user error affect the marketplace. When I buy my morning coffee at Starbucks, the cup warns me: "Careful, the beverage you are about to enjoy is extremely hot."
Construct a 95 percent confidence interval for the population mean. Is it reasonable that the population mean is 28 weeks? Justify your answer
MATH1550H: Assignment: Question: Experience shows that X, the number of customers entering a post office during any period of time t, is a random variable the probability mass function of which is of the form
More than 5 percentage points in either direction from what would have been obtained by interviewing all voters in the United States. Find the sample size suggested by this statement.
Harrington Health Food stocks 5 loaves of Neutro-Bread. The probability distribution for sales of Neutro-Bread is listed in following table. How many loaves will Harrington sell on average?
you are visiting las vegas and would like to come home with more money than you arrived with. use your knowledge of
question correlation and regression analysisthe owner of a financial services firm believes that there is a
If an employee is selected for promotion, find the probability that the employee will be under 25 or a female. Express your answer as a fraction in lowest terms.
Assume that the variable B is the number of years of experience. Suppose the person has 2 years of college and 7 years of experience. What should their salary be?
An education expert is researching teaching methods and wishes to interview teachers from a particular school district. She randomly selects ten schools from the district and interviews all of the teachers at the selected schools.
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