Question

how temperature of water affects breathing rate looking at the graph above, the data was collected from an experiment on a small group of people. which choice below could have been an error that led to this data? a a different - aged individual was measured at each temperature. b this experiment was completed on a random group of 40 - year olds. c the water level used in this experiment was the same for all individuals. d each breathing rate of the individuals was measured with two different devices.

Explanation:

In an experiment to study the effect of water - temperature on breathing rate, variables should be controlled. Measuring each individual's breathing rate with two different devices can introduce variability due to differences in device accuracy and calibration, which could be an error source for the data. Option A might not necessarily be an error if age effects are accounted for. Option B is a valid experimental design choice if the focus is on a specific age group. Option C is a proper control measure and not an error.

Answer:

D. Each breathing rate of the individuals was measured with two different devices.