Problem:
After the preliminary tests, improvements were made to increase reliability and validity. Teeth were dried multiple times and the lowest mass was recorded to ensure accuracy. All samples were treated equally, and measurements were checked multiple times to ensure consistent and precise results. A wider range of pH values, including 2.5 and 3.5, was used to provide more detailed data and produce a smoother graph. Two teeth were used for each pH level, and a total of 14 teeth were used to increase the sample size and improve reliability. Accuracy was improved by drying the teeth to a constant mass, ensuring the true mass was measured. Precision was improved by repeating measurements and obtaining similar values. Reliability was improved by using two teeth for each pH value, which reduced the effect of random error and made the results more consistent. Overall, the design of the experiment was valid because it directly measured mass loss as an indicator of tooth decay, and the improvements made helped ensure the results were more accurate, precise, reliable, and valid. Put these points in simple eng in a paragraph. Need Assignment Help?