In team teaching, two or more teachers lead a class. A researcher tested the use of

team teaching in mathematics education. Two of the variables measured in each

sample of 164 mathematics teachers were years of teaching experience x and reported

success rate y (measured as a percentage) of team teaching mathematics classes.

a) The researcher hypothesized that mathematics teachers with more years of

experience will report higher perceived success rates in team-taught classes. State

this hypothesis in terms of the parameter of a linear model relating x to y.

b) The correlation coefficient for the sample data was reported as r = -0.32. Interpret

this result.

c) Does the value of r support the hypothesis? Test using = .05.