Demarco is working at his grandmother’s law office describing the distribution of billing times. An SRS of 23 times revealed the following results regarding the relationship between billed as deposition and billed as negotiation. The mean billed as deposition is 14.13 hours/week with a standard deviation of 3.432. The mean billed as negotiation is 23.38 hours/week with a standard deviation of 2.868. The correlation coefficient is -0.6699.

a) Describe the association between the billed as deposition and billed as negotiation of billing times as seen in the sample.

b) Determine r-squared and its meaning in the context of this sample.