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The Agency for Healthcare Research and Quality reports that medical errors are responsible for injury in 1 out of every 25 hospital patients in the United States. These errors are tragic and expensive. Preventable health care-related errors cost the U.S. economy an estimated $2 billion each year. Suppose that you select a sample of 100 U.S. hospital patients.
The probability is 90% that the sample percentage will be within what symmetrical limits of the population?
The probability is 95% that the sample percentage will be within what symmetrical limits of the population?
Critically discuss the reasons for studying statistics? Choose five random numbers between 70-100. Calculate the mean, and midrange of these numbers.
How could the Central Limit Theorem apply in making a business decision? Try to provide an example from your current or future career.
A member of Congress wants to determine her popularity in a certain part of the state. She indicates that the proportion of voters who will vote for her must be estimated within plus or minus 2 percent of the population proportion.
Assume that the standard deviation of college student IQ's is 10. A random sample of 100 students from a college showed an average IQ of 110. Compute a 95% confidence interval for the mean IQ of students attending this college.
If the sample standard deviation is s = 10, are the data sufficient to conclude that the treatment has significant effect using a two-tailed test with α = .05?
What is the probability of a fatal accident over a lifetime? Explain your reasoning carefully. Hint: Assume independent events. Why might the assumption of independence be violated? Why might a driver be tempted not to use a seat belt "just on thi..
The director of admissions at a large university advises parents of incoming students about the cost of textbooks during a typical semester.
In the real world, given null hypothesis is false; but the collected data lead to the null hypothesis being accepted. That is, the data lead to a failure to reject null hypothesis.
Draw a tree diagram representing this experiment. Use this tree diagram to find the probabilities below.
A company wants to know if minorities are more likely to be in certain job categories than others. Their data base codes employees 1 for clerical, 2 for custodial, and 3 for manager. A logistic equation was fit to the data with SPSS.
A certain airplane has two independent alternators to provide electrical power.
To sketch the 3-sigma X-bar chart and R-chart parameters. A candy bar manufacturer desires to set up a variables control chart for the net weight of its candy bars.
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