List all 6 possible SRSs of size n = 2, calculate the proportion of red cars in the sample, and display the sampling distribution of the sample proportion on a dotplot. Is the sample proportion an unbiased estimator of the population proportion? Explain your answer.

The small population of 4 cars listed in the table.

Color .................... Age (years)
Red ..................................... 1
White ................................. 5
Silver .................................. 8
Red ................................... 20