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A researcher finds a correlation between self esteem and shyness is -0.50, which is significant for his sample. Interpret this correlation.
What does a correlation coefficient tell us? Why are correlation coefficients useful when assessing reliability?
What are the 2 ways in which researchers assess the reliability of their measures? Be sure you understand the difference among these 2 approaches to reliability.
What is validity with respect to a research project? Discuss the different types.
What is validity with respect to the measurement of a psychological construct?
Consider a worker-paced line with three process steps, each of which is staffed with one worker. The sequence of the three steps does not matter for the completion of the product.
Below you are given a partial computer output based on a sample of 16 observations.
Construct an appropriate control chart and comment on the process.
Draw suitable distribution curve indicating position of the TS and CV.
In a sample of 855 bartenders, 48% heard complaints from persons about work. If the margin of error was 4.4%, what was the confidence level that was used?
Create a scatter diagram and consider the correlation for the given data. Create a scatter diagram and sketch the line you think best fits the data.
Create a stem-and-leaf display of these data. Create a box plot of these data.
Assuming an exponential service rate μ, set this up as a birth and death process and determine the birth and death rates.
A meat processing plant has processed an average of 100 tons per day for the last several years. Newer processing machines have been installed recently.
In each of the following cases, decide whether or not a binomial distribution is an appropriate model, and give your reasons.
The average number of hours of sleep per night that a college freshman gets is 6.50 with a standard deviation of 1.80 hours. If 35 college freshmen are randomly chosen find the probability that they average at least seven hours of sleep per night.
Drawing the standard normal curve and indicating the area representing the probability and
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