The two points to the lower left of the original plot are the two points where zero species were observed.If these points are judged to be erroneous observations and deleted from the analysis, what would be the effect of the deletion on the sample statistics and best fit line for this data?
A)The mean species observed and slope of the best fit line would be larger.
B)The standard deviation of pH would increase and the slope would be smaller.
C)The mean and standard deviation of the pH would be larger.
D)The mean and standard deviation of the species observed would be larger.
E)The standard deviation of pH would decrease and the slope would be smaller.

Question

Quizplus · Accepted Answer

Deleting the two points with zero species observed would decrease the range of pH values, resulting in a decrease in the standard deviation of pH. Additionally, the deletion of outliers would likely result in a smaller slope for the best fit line. However, deleting these points would not have any effect on the mean or standard deviation of either the pH or the species observed.

The Two Points to the Lower Left of the Original