Two researchers look at the relationship between the number of visits to the doctor with flu, and the temperature in different cities. They use the same data, but one researcher uses the Fahrenheit scale of temperature, and one uses the Celsius (centigrade scale). What would you expect:
A) Same correlation, same slope, different intercept.
B) Same correlation, different slope, different intercept.
C) Different correlation, different slope, different intercept.
D) Same correlation, same slope, same intercept.

Question

Quizplus · Accepted Answer

Since both researchers are using the same data set, the correlation between the number of visits to the doctor with flu, and the temperature in different cities should be the same. However, since the two researchers are using different temperature scales, the slope of the regression line will be different. This is because Celsius and Fahrenheit scales have different units of measurement and different zero points. Therefore, the intercepts will also be different.

Two Researchers Look at the Relationship Between the Number of Visits