Question

A crop scientist evaluating lettuce yields plants 20 plots, treats them with a new fertilizer, lets the lettuce grow, and then measures yield in numbers of heads per plot, with these results: 145, 142, 144, 141, 142, 155, 143, 157, 152, 143, 103, 151, 150, 148, 150, 162, 149, 158, 144, 151

Test whether the lettuce data are compatible with a population median of 150, or rather are strong evidence of a median less than 150. The p-value is:

Answer 1