Question

which are ways to improve the design of this experiment? check all that apply.
reduce the sample size so the experiment can be done faster.
increase the sample size from 6 cups to 12 cups of sand and water.
use more legible handwriting when recording data.
use more precise digital thermometers.
use more precise scales that measure to the hundredth of a gram.

Explanation:

• Reducing sample size reduces reliability, so it's not an improvement.
• Increasing sample size (from 6 to 12 cups) improves the experiment's reliability by reducing random error.
• Legible handwriting helps with data recording but isn't a core experimental design improvement.
• More precise thermometers improve measurement accuracy, enhancing the experiment.
• More precise scales (to hundredth of a gram) improve measurement accuracy, aiding the experiment.

Answer:

B. Increase the sample size from 6 cups to 12 cups of sand and water, D. Use more precise digital thermometers, E. Use more precise scales that measure to the hundredth of a gram