Wednesday
July 23, 2014

Homework Help: Statistics

Posted by Sue on Sunday, May 26, 2013 at 10:05am.

The accompanying data show the number of hours, x, studied for an exam and the grade received, y (y is measured in tens; that is, y = 8 means that the grade, rounded to the nearest 10 points, is 80).

x 2 3 3 4 5 5 5 6 6 6 7 7 7 7 8
y 5 5 6 5 6 7 8 6 9 8 7 9 10 8 9


Maple Generated Plot
(a) Use the given scatter diagram to estimate r for the sample data on the number of hours studied and the exam grade.
r

(b) Calculate r. (Give your answer correct to two decimal places.)
r =

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