QUESTION 3

Using R Commander and PlaqueIndexScore2.csv, calculate the mean plaque index score for Males. Calculate your answer to TWO decimal places: X.XX and no other extraneous text.

QUESTION 4

Using R Commander and PlaqueIndexScore2.csv, calculate the SD of plaque index score for Females. Calculate your answer to TWO decimal places: X.XX and no other extraneous text.

QUESTION 5

Which figure represents the distribution of males’ plaque index scores from the data, PlaqueIndexScore2.csv?

1. Figure 1