Question

A biology class is conducting an experiment to determine how soil pH may affect the germination of pine seedlings. Three pine seeds are placed in a pot of soil with a pH of 6.5, and three pine seeds are placed in a pot of soil with a pH of 4.0. After one week, the students count the number of seeds which have germinated and determine the mass of each pine sprout. Which of these is the BEST way to improve the accuracy and validity of the data in this experiment?

A) repeat the experiment with other types of seeds
B) repeat the experiment using soils of different pH
C) increase the sample size by using additional pots and seeds
D) increase the number of independent variables in the experiment

Answer 1

the correct answer is C. ;)

Answer 2

Increasing the sample size by using additional pots and seeds is the best way to improve the accuracy and validity of the data in the experiment.

How does increasing the sample size increase the accuracy and validity?

Multiple measurements can be made, changes over time can be seen, and the human component can be taken into account.

Our estimate is more accurate since we have more information and hence more data. Our estimate is more certain, our uncertainty is lower, and our precision improves as our sample size grows.

Learn more about the quality of experiments here:

https://brainly.com/question/11244970

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