Question

Question 11 dr. johnson wants to do a study to investigate whether the physiological measure, heart rate variability, varies over time or whether it is a trait that stays stable within the same person over time. he records participants’ heart rate variability once at the beginning of the semester and once at the end of the semester. he finds a high positive correlation (r = .55 between the first and second time points. what would a scatterplot of these results (heart rate variability at the beginning of the semester on the x-axis, heart rate variability at the end of the semester on the y-axis look like?

a. the cloud of points would have no slope at all.
b. there isn’t enough information given to determine this.
c. the cloud of points would slope upward from left to right.
d. the cloud of points would slope downward from left to right.

Answer 1

The correct option is C. This is because there is high positive correlation between the two variables examined, so the scatter plot will slope upward from left to right.