A local citizen science group is monitoring the water quality of a nearby lake. They gather water

samples once a week on Wednesday between the hours of 7 A.M. and 9 A.M. from the same location.

One day in August they were unable to sample within that time frame and collected the sample at

3 P.M.

How might this modification to the sampling procedure affect the results?

This modification to the sampling procedure greatly affect the results because timing of sampling is very important that can change the results of an experiment. The water quality of lake is different in different times of the day due to human activities. The quality of water is good in the morning when there are no or less activities of people as compared to afternoon when the human activities are very high so timing can greatly affect results of the experiment.