Question: The data file < GRADES > contains a sample of student marks and grades from a population of students enrolled in a statistics unit. a.

The data file < GRADES > contains a sample of student marks and grades from a population of students enrolled in a statistics unit.

a. Calculate the mean, median, range and standard deviation for total marks. Interpret these measures of central tendency and variability.

b. List the five-number summary for total marks.

c. For total marks, construct and interpret a box-and-whisker plot.

d. Ignoring students who did not attempt the final exam, calculate the covariance and coefficient of correlation for semester and exam marks.

e. What conclusions can you reach about the relationship between a student’s semester and exam marks?

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