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Question: 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?
Find the five-number summary for Group 1.- Find the five-number summary for Group 2.- Compare the values of the range for the two groups.
Prove that a and b are coprime if and only if no prime numbers divides both a and b. Show that [a,m] = m if and only if a divides m
Your new project is coming in over budget and requires a cost change through the cost change control system. The cost variance was projected using which of the following tools and techniques?
Does the current system of alternating ballparks even out the home field advantage? How often will the team that begins at home win the series?
Either about $800,000 or about $2.2 million depending on which "average" it used. Which type of "average" does the $800,000 represents?
You observe that classmates who get good grades tend to sit toward the front of the classroom, and those who receive poorer grades tend to sit toward the back.- What are three possible cause-and-effect relationships for this non experimental observ..
Dropouts. A Statistics professor has observed that for several years about 13% of the students who initially enroll in his Introductory Statistics course.
the mean weight of loads of rock is 51.0 tons with a standard deviation of 6.0 tons. if 16 loads are chosen at random
Find a 95% confidence interval for the mean monthly rent for unfurnished one-bedroom apartments available for rent in this community.
An insurance company is trying to determine if there is a significant difference in the average number of sick days that registered nurses and nurse practitioners use per year. The data analysis provided the following output.
Car Emissions: Listed below are measured amounts of greenhouse gas emissions from cars in three different categories. The measurements are in tons per year, expressed as CO2 equivalents.
For these 4 questions below what would be the independent and dependent variables, the level of measurement and whether or not the variable is discrete or continuous.
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