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A professor told a class that she found a correlation coefficient of .20 between the alphabetical order of a person's last name and that person's cumulative point total for 50 students in a general psychology course.
One student in the class wondered whether the correlation coefficient was reliable; that is, would a nonzero correlation be found in other classes? How can reliability be determined without calculating an r on another class?
suppose that the amounts that students at a college spend on textbooks this semester have a normal curve with mean ? mu
What population are the researchers interested in? Was this study observational or experimental? What population are the researchers interested in? How did the researchers select their sample?
Using a level of significance of .10, is there evidence that the dual degree students are receiving lower grades? Fully explain your answer.
a wildlife biologist examines frogs for a genetic trait. previous research found this trait in 1 of 4 frogs. the
Create an initial post in which you analyse key social and/or ethical issues, of your choosing, associated with social networking websites. Start by summarising your selected ethical/social issues, and explain why you think these issues are import..
A company is thinking about launching product. The table below shows the analyst conclusions with respect to the demand and return for the company on the product. Calculate the standard deviation. Show all work
Standard deviation was $15.50. For 56 Model B ovens, the mean repair cost was $85 and the standard deviation was $30. At alpha=.01, would you buy Model A?
We're going to use the statistical software, Statistical Package for the Social Sciences or SPSS, to work with data in this class. It analyzes data on a spreadsheet. The data must be entered on the spreadsheet correctly for the analyses to be corr..
the measurements of weight of 100 units of a product manufactured by two parallel processes have same mean but the
the number of complaints that a discount store receives on their product per week is a random variable having poisson
What is the probability that no requests for assistance are in the system? What is the average number of requests that will be waiting for service? What is the average waiting time in minutes before service begins?
Compute the mean number and median number of apples in a bag.
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