Question Number 9 of 20 - 8th Grade Science
A student measured the power of a motor operating at different temperatures. The student recorded a total of 11 measurements, one at each 2 degree interval between 10°C and 30°C. Which change in the procedure would most improve the validity of conclusions based on this investigation?
f Decreasing the range of the independent variable
g Producing a graph of numerical observations
h Repeating the experiment several times
j Increasing the number of variables
h Repeating the experiment several times
By repeating the experiment several times, the student can ensure that the results are consistent and reliable, leading to more valid conclusions.