A car company wants to know the monthly sales made in ($000), based on the brand of vehicle. The data collected was entered on a MINITAB spreadsheet for analysis. Exhibit II below was subsequently...

a) Determine the values of * and **.
b) Give the unbiased point estimate for the average monthly earning from Hyundai Vehicles.

c) Give the unbiased point estimate for the variance of monthly earning from Hyundai Vehicles.

Extracted text: A car company wants to know the monthly sales made in ($000), based on the brand of vehicle. The data collected was entered on a MINITAB spreadsheet for analysis. Exhibit II below was subsequently generated. Exhibit 2 Model N Mean Median Tri.Mean Std Dev S.E. Mean Hyundai 23 109 135 107.64 1.34 Toyota 27 165 124 143.65 9.5 **