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Towers Perrin, a New York human resources consulting firm, conducted a survey of 1100 employees at medium-sized and large companies to determine how dissatisfied employees were with their jobs (The Wall Street Journal, January 29, 2003). Representative data are shown in the file JobSatisfaction. A response of Yes indicates the employee strongly disliked the current work experience.What is the point estimate of the proportion of the population of employees who strongly dislike their current work experience (to 2 decimals)?
b. At 95% confidence, what is the margin of error?
c. What is the 95% confidence interval for the proportion of the population of employees who strongly dislike their current work experience?
Write a sentence showing how the outcome of the hypothesis test and the measure of effect size would appear in a research report.
A fast-food restaurant sells hamburgers and chicken sandwiches. On a typical weekday, the demand for hamburgers is normally distributed with a mean 313 and a standard deviation 57; the demand for chicken sandwiches is normally distributed with a m..
The Awake Coffee Company produces gourmet instant coffee. The company wants to be sure that the average fill of coffee containers is 12.0 ounces.
Determine if there is evidence to conclude that the mean number of vacations taken by married individuals is less then the number taken by single/divorced individuals using data in Excel file vacation survey.
Key Refining decided to send a special financing plan to charge account customers having the highest 10 percent of the money charges. What is the dividing point between customers who receive the special plan and those who do not.
Find the most powerful predictor among the six independent variables using regression.
The lives of many people are affected by a fear that prevents them from flying. An institute for public opinion conducted a poll of 1014 adults, 48%of whom were men.
a) Set up the null and alternative hypotheses, and perform the hypothesis test. b) Based on these results, does the diet appear to be effective? Does the diet appear to have practical significance?
What is the percent difference between the two amounts relative to the amount for mathematics majors (round to the nearest percent)?
Assume a restaurant business succeeds 60% of the time. Suppose that there are three such restaurants open in your city. When they don't compete with one another
Sample with size n = 100 has mean = 30. Assuming the population standard deviation is 8, construct 95% confidence interval for population mean.
Finding probability for the given values of the uniform density curve
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