Correlation and Regression Lines
A researcher desires to know whether the typing speed of a secretary (in words per minute) is related to the time (in hours) that it takes the secretary to learn to use a new word processing program. The data are shown. Speed x 48 74 52 79 83 56 85 63 88 74 90 92 Time y 7 4 8 3.5 2 6 2.3 5 2.1 4.5 1.9 1.5 (a) find the val