Two students performed the same experiment, testing how far iodine will diffuse through starchy tissue, such as potatoes. They cut 5 potato squares each, all of equal sizes, and placed them into small cups with iodine solution for 15 minutes. Then they measured how far from the edge of the potato the iodine diffused into the potatoes, in millimeters. distance diffused (mm)
trial 1 trial 2 trial 3 trial 4 trial 5
student 1: 3.25 3.17 3.26 3.64 3.44
student 2: 3.14 3.43 3.22 3.37 3.28

whose results are more reliable, why?

A. student 1, because they have a wider range.

B. student 1, because they have a narrower range.

C. student 2, because they have a narrower range.

D. student 2, because they have a wider range.

Air pressure is measured in pascals. for a professional american football game, the ball should be inflated to about 90,000 pascals. scientists studied the effects of air temperature on the pressure inside american footballs by taking these steps: 1. prepare 100 footballs. 2. measure each football's air pressure. 3. divide footballs into 10 groups. 4. place the groups in different lockers cooled to different air temperatures. 5. after 12 hours, remove the footballs from lockers. 6. measure each football's pressure again. 7. compare the new pressures to the starting pressures. what two terms best describe the variable "air pressure inside the football" in this experiment? independent, qualitative independent, quantitative dependent, qualitative dependent, quantitative