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Consider the given set of average annual household income levels of citizens of selected U.S. metropolitan areas in the table below.
a. Use excel to obtain a simple random sample of size 15 from this frame.
b. Using the sample generated in part a., construct a 99% confidence interval for the mean average annual household income level of citizens in the selected U.S. metropolitan areas. Assume that the population consists of all average annual household income levels in the given frame.
c. Interpret the 99% confidence interval constructed in part b.
d. Does the 99% confidence interval contain the actual population mean? If not, explain why not. What proportion of many similarly constructed confidence intervals should include the true population mean value?
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One of the statistics collected is the porportion of time employees forget to include a napkin in the bag. What is the probability that there is no napkin included for a given order?
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Otherwise, no ordering will take place. Find the steady-state probabilities of the state of this Markov chain?
Find the value of x that corresponds to each of these standard scores z = -1.85.
Determination of statistical significance can only be determined by calculating the exact p value and declaring results as significant. True or false?
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The total population of car passengers involved in traffic accidents are classified into six categories: two factors (one with 2 levels and one with 3 levels) crossed.
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