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Imagine that you predicted a moderate correlation between people's scores on a measure of anxiety and the degree to which they report having insomnia.
You administered measures of anxiety and insomnia to a sample of 30 participants, and obtained a correlation coefficient of .28. Because this correlation is not statistically significant (the critical value is .30), you must treat it as if it were zero.
Yet you still think that anxiety and insomnia are correlated. If you were going to conduct the study again, what could you do to provide a more powerful test of your hypothesis?
suppose that on a statistics test the mean greade in a class is 75 and the population standard deviation is 8. assume
suppose you are conducting a study with a total of 50 participants from five different regions of the country and you
a student received an a on the first test of the semester. the student wants to calculate the probability of scoring an
Each group will use a search engine of their choice to find combined GIS/GPS applications as well as look at various vendor sites to find success stories. (For GPS vendors, look at http://biz.yahoo.com (directory) and Google.) Each group will make..
When the machine is functioning correctly the company expects a mean of 10.00 mm and a standard deviation of 0.05 mm. The machine is overhauled when the variability (i.e. the SD) deviates from the norm by 50% or more. What do your results suggest ..
You have met an acquaintance for lunch, and he is worried about an upcoming meeting with his boss and some executives from his firm's headquarters. He has to outline the costs and benefits of some alternative investment strategies.
Which one of the following influences a person's value system? Which one of the following have been found to be relatively universal values?
you and your friend join a new gym that requires a one-time joining fee and monthly payments. 10 ptsa. if your friend
Explain the concepts involved in hypothesis testing, including what hypothesis testing is, and an explanation of the four types of scales used to measure data.
The following table shows the grade point average (GPA) for five students along with their entrance exam scores for MBA programs (GMAT). Develop a model that would predict the GPA of a student based on his GMAT score. What would be the predicted G..
The manufacturer has to replace or exchange 10% of its model I and 18% of its model II. If a model is selected at random, find the probability that it will be defective?
Should the conclusions between the two tests consistent? Why or why not? If the conclusions are not consistent, which one would you agree with and why?
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