Question a-b

A retailer wanted to estimate the monthly selling expenses. She collected data from the past 8 months. The total selling expenses and the total sales (both in $1000) wer recorded as follows. Total Sales: 50 40 60 80 20 40 60 50 Selling Expenses: 18 16 18 17 13 20 17 17 (a) Draw the scatter plot (by hand). (b) Obtain the correlation coefficient of this sample. Compare this value with you scatter plot and interpret the result