Piecewise Defined Functions Answers

A statistics student wants to determine if there is a relationship between a student’s number of absences, x, and their grade point average (GPA), y. The given data lists the number of absences and GPAs for 15 randomly selected students.Using technology, what is the correlation?

A certain standardized test measures students’ knowledge in English and math. The English and math scores for 10 randomly selected students are given in the table.Using technology, what is the correlation coefficient?

A statistics student wants to determine if there is a relationship between a student’s number of absences, x, and their grade point average (GPA), y. The given data lists the number of absences and GPAs for 15 randomly selected students.Using technology, what is the equation for the least-squares regression line?

A certain standardized test measures students’ knowledge in math and English. The scatterplot displays the scores for 10 randomly selected students.

The weight (in pounds) and height (in inches) for a child were measured every few months over a two-year period. The measurements are given in the table.Using technology, what is the equation for the least-squares regression line?

The arm span and foot length were measured (in centimeters) for each of the 19 students in a statistics class and displayed in the scatterplot. An analysis was completed and the computer output is shown. PredictorCoefSE Coeft-ratiopConstant-7.6112.5672.9650.046Arm span0.1860.0355.3770.000S = 1.61R-Sq = 63.0%R-Sq(Adj) = 62.7%

The scatterplot displays the number of pretzels students could grab with their dominant hand and their handspan, measured in centimeters. An analysis was completed and the computer output is shown. PredictorCoefSE Coeft-ratiopConstant-14.714.3171.6890.046Handspan1.5850.3105.1140.000S = 3.05R-Sq = 52.1%R-Sq(Adj) = 51.7%

The scatterplot displays the number of pretzels students could grab with their dominant hand and their handspan, measured in centimeters. An analysis was completed and the computer output is shown. PredictorCoefSE Coeft-ratiopConstant-14.714.3171.6890.046Handspan1.5850.3105.1140.000S = 3.05R-Sq = 52.1%R-Sq(Adj) = 51.7%

The arm span and foot length were measured (in centimeters) for each of the 19 students in a statistics class. The results are displayed in the scatterplot.

The scatterplot displays the number of pretzels students could grab with their dominant hand and their handspan, measured in centimeters. An analysis was completed and the computer output is shown.PredictorCoefSE Coeft-ratiopConstant-14.714.3171.6890.046Handspan1.5850.3105.1140.000S = 3.05R-Sq = 52.1%R-Sq(Adj) = 51.7%