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Question: Suppose a bill is considered late if it is paid after 20 days. In this case its "lateness" is the number of days over 20. For example, a bill paid 23 days after billing has a lateness of 3, whereas a bill paid 18 days after billing has a lateness of 0. Find a 95% confidence interval for the mean amount of lateness for all customers. Find similar confidence intervals for each customer size separately. Why is the distribution of lateness certainly not normal? Do you think this matters for the validity of the confidence interval?
Then repeat the process of generating 1000 confidence intervals. Report the percent hit. How does this compare with the percent hit that you found in the previous exercise?
last year the records of dairy land inc. a convenience store chain showed the mean amount spend by a customer was 30. a
normally distributed with a population mean of 2.5 and a population standard deviation of .5. Compute the following, showing all work: The percentage of students with GPA's above 3.0 is?
computing the mean median range and standard deviation for the given data.weekly salaries in dollars for a sample of
A is the set of positive divisors of 24, that is A= {1,2,3,4,6,8,12,24}, and the relation R is dividing. If B is the set of positive divisors of 24 except 1, what is the minimal element(s)? smallest element? maximal element(s)? largest element of ..
Use the normal distribution to find a confidence interval for a proportion P given the relevant sample results. Give the best point estimate for P, the margin of error, and the confidence interval. Assume the results come from a random sample.
The estimated proportion nonconforming of the transmission systems is 0.003. Using Deming's kp rule, what inspection policy should be used?
Although the packet claims a germination rate of 92%, only 171 or 200 test seeds sprout. Is this evidence that the seeds have lost viability during a year in storage?
Use a single value to estimate the mean weight of all quarters.? Also, find the? 95% confidence interval for the average weight of all quarters.
Identify the independent variables as quantitative or qualitative.- Write the first-order model for E(y).- Write a model for E(y) that contains all first order and interaction terms.
Develop a process map about the prescription filling process for HMO's pharmacy, in which you specify the key problems that the HMO's pharmacy might be experiencing.
Let X1,..., X4 be binary. Draw the independence graphs corresponding to the following log-linear models. Also, identify whether each is graphical and/or hierarchical (or neither).
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