Five auditors participated in an experiment. Each was asked to identify errors or “red flags” in the financial statements of a fictitious company. The time that each of the five took to do the audit and the number of “red flags” properly identified were recorded, with the following results:

Time (min)                 Red Flags

190……………………          20

160……………………          40

150……………………          30

180……………………          25

170……………………          35

Show the scatter diagram. Compute and interpret the covariance.