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Waiting time at a bank drive-in widow the average waiting time at a drive-in window of local bank is 10.3 minutes, with a standard deviation of 2.7 minutes. Assumes the variable is normally distributes. If a customer arrives at the bank, find the probability that the customer will have to wait a. between 4 and 9 minutes. B. less than 5 minutes or more than 10 minutes. C. how might a customer estimate his or her approximate waiting time?
Describe how the confidence intervals will change depending on whether the population standard deviation is known or unknown.
Data editing deals with detecting and correcting illogical, inconsistent, or illegal data in the information returned by the participants of the study.Explain the differences among illogical, inconsistent, and illegal data; and recommend steps to min..
computing the probability values using normal distribution.information from the department of motor vehicles indicates
Construct a 98 percent confidence interval estimate of the difference between the two sample means (Please show work).
These plot yields followed approximately a normal distribution with mean 88 lb and SD 7 lb. Find the probability that any one randomly selected plot yield is greater than 90 lb.
the research team to identify if accounts with larger balances consistently take advantage of their additional services. Formulate a hypothesis statement regarding our research issue.
Can you think of an example where regression analysis can be used? How is regression analysis being used in a retail environment, or how should it be used?
Pick a random sample of 50 homes from the enclosed 90 cases. Double the asking price and selling price and use this data to develop three predictive models:
Find an unbiased estimator of mp(1 - p)/n. Find the optimal estimator using the Rao-Blackwell Theorem.
What is the intercept for the logistic regression equation and What is a 95% confidence interval for the odds ratio
a. Define variables that would tell how many units to purchase from each source. b. Develop an objective function that would minimize the total cost.
If the mean number of small business failures per month is 10, what is the probability that exactly four small businesses will fail during a given month?
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