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Q1) Auditor reviewed 25 oral surgery insurance claims from particular surgical office, finding that mean out of pocket patient above reimbursed amount was $275.66 with standard deviation of $78.11.
a) At 5% level of significance, does this sample prove violation of guideline that average patient must pay no more than $250 out of pocket?
b) Mention your hypotheses and decision rule? Is this close decision?
Q2) Web based company OH Baby! Has goal of processing 95% of its orders on same day they are received. IF 485 out of the next 500 orders are processed on same day, would this prove that they are beyond their goal, using α= .025?
Suppose Abraham Lincoln had answered a survey questionnaire in which he indicated that he had not received a grade school diploma. The researcher found that Lincoln's educational score did not correlate with the expected variables. What was wrong?
Write introduction to STATISTICAL PROCESS CONTROL and Explain the use of SPC tools used at D2D
The number of passengers on the Carnival Sensation during one-week cruises in the Caribbean follows the normal distribution.
Test to see if the mean cell phone bill has changed since 2004. Use a .05 level of significance for the test.
Calculate chi-square for the cross-tab. Show your work. Is there a statistically significant relationship between these variables?
The heights of young women are approximately normal with mean 65 inches and standard deviation 2.5 inches.
One of the major measures of the quality of service provided by any organization is the speed with which responds to customer complaints. A large family-held department store selling furniture and flooring, including carpet, had undergone a major ..
A month is classified as "extremely wet" if the amount of rainfall is in the upper 10% for that month. How much precipitation must fall before a month of April is classified as "extremely wet".
If you did not know anything about standard deviation of population from which sample was taken, find out the 95% confidence interval for mean test score.
State in each of given cases whether you would expect relationship between given variables to be positive or negative or neither.
Compute descriptive statistics for each stock and the S&P 500. Comment on your results. Which stocks are the most volatile? Compute the value of beta for each stock. Which of these stocks would you expect to perform best in an up market? Which..
Find the probability that in a given month:
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