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The local police department must write, on average, 5 tickets a day to keep department revenues at budgeted levels. Suppose the number of tickets written per day follows a Poisson distribution with a mean of 6.5 tickets per day. Interpret the value of the mean.
a. The number of tickets that is written most often is 6.5 tickets per day.b. If we sampled all days, the arithmetic average or expected number of tickets written would be 6.5 tickets per day.c. Half of the days have less than 6.5 tickets written and half of the days have more than 6.5 tickets written.d. The mean has no interpretation since 0.5 ticket can never be written.
What percentage of the bank's customers carries average daily balances below of $200? What percentage of the bank's customers carries average daily balances between $300 and $700?
The following table gives the median incomes of families by level of income and geographical region.
Find the z-score for each student. Assuming both tests measure the same kind of ability, which student had the higher score?
FedEx and United Parcel Service (UPS) are the world's leading cargo carriers by volume and revenue (The Wall Street Journal, January 27, 2004).
State the number of degrees of freedom that are associated with each of the following extra sum of squares and why this is the case:
In the instance in which the selected theory of motivation was not applicable to your workplace experience, assess the need to develop and create new theoretical models of motivation in today's changing work environment.
their average cost was 340.00 with standard deviation of 80.00. Dean of students thinks that costs are greater this semester. Determine the test value for this hypothesis.
What is the probability that a randomly-selected truck travels between 30 and 60 thousand kilometres in one year. Standard deviation of 12.0 thousand kilometres.
Develop the estimated regression line. Jensen expects to use the machine 30 hours per week, develop a 95% prediction interval for the company's annual maintenance expense.
Dr. Walker is an industrial psychologist. She is currently studying stress among executives of Internet companies. She has developed a questionnaire that she believes measures stress.
Explain why the t distribution is used as a part of the confidence interval.
The probability that at least 5 children out of 10 in a sample taken from a school may have a blood level that may impair development is?
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