According to an Advertisement, a Strain of Soybeans Planted on Soil

Essay

According to an advertisement, a strain of soybeans planted on soil prepared with a specified fertilizer treatment has a mean yield of 528 bushels per acre. Twenty-five farmers who belong to a cooperative plant the soybeans in soil prepared as specified. Each uses a 40-acre plot and records the mean yield per acre. The mean and variance for the sample of 25 farms are $\bar { x } = 484$ and $s ^ { 2 } = 9170$ . Specify the null and alternative hypotheses used to determine if the mean yield for the soybeans is different than advertised.