According to an advertisement, a strain of soybeans planted on soil prepared with a
specified fertilizer treatment has a mean yield of 556 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 9580. Specify the null and alternative hypotheses
used to determine if the mean yield for the soybeans is different than advertised.