Question

a student hypothesized that lettuce seeds would not sprout (germinate) unless they were exposed to darkness. the student planted 10 lettuce seeds under a layer of soil and scattered 10 lettuce seeds on top of the soil. the data collected are shown in the table below. data table seed treatment number of seeds germinated planted under soil 9 scattered on top of soil 8 one way to improve the validity of these results would be to conclude that darkness is necessary for lettuce seed germination conclude that light is necessary for lettuce seed germination revise the hypothesis repeat the experiment

Explanation:

To improve the validity of experimental results, repeating the experiment is a common and effective method. This helps to reduce the impact of random errors and chance occurrences. Concluding directly based on a single - trial experiment (options 1 and 2) is not reliable as there could be other unaccounted - for variables. Revising the hypothesis (option 3) is part of the scientific process but not the immediate way to improve the validity of these specific results. Repeating the experiment allows for more data collection and a better assessment of the relationship between the variables (in this case, darkness/light and seed germination).

Answer:

repeat the experiment