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An airline would like to determine, within 3 percentage points and with 95% confidence, the percentage of next month's customers who judge the courtesy of its employees as being "very good to excellent." What sample size would you recommend?
For this Assignment, you will continue your practice as a critical consumer of research. You will critically evaluate a scholarly article related to one-way ANOVA testing.
using the cv compare the variability of the two items. suggest reasons for any differencescv of item nr 1cv 0.01837cv
Normally distribution with µ=8 minutes and σ=2 minutes. If you select random samples of 25 calls, what percentage of the sample means would be between 7.8 and 8.2 minutes?
You have also been given some information regarding average salary levels of managers after one year with the company, as well as the retention rates for first year managers for 10 office locations. Based on what you have been given, is there a co..
Support colour-coding on packaged food to indicate healthier options
A sample of 4 trucks is randomly selected. What is the probability that 2 of those tested have defective brakes.
The overall results on the French exam had a mean of 72 and a standard deviation of 8, while the mean math score was 68, with a standard deviation of 12. On which exam did she do better compared with the other freshmen?
a. Write the formula for the probability curve of x. b. Graph the probability curve of x.
Suppose a researcher has trained observers to rank participants according to their level of frustration when trying to solve a puzzle.
Find the reliability of the transistor after 4000 hours of operation. What is the mean time to failure? If the repair rate is 0.004/hour, find the availability.
Note that this restricts the range of X values. Without looking at the data, can you predict whether Pearson's correlation will increase or decrease after these points are removed?
Assume that x is an Independent variable and y is a dependent variable. Calculate the Pearson correlation coefficient. What does the correlation mean? Is the correlation statistically significant at the 5% level? What is the effect size? What is the ..
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