Question

According to an advertisement, a strain of soybeans planted on soil prepared with a specified fertilizer treatment has a mean yield of 103 bushels per acre. Fifteen farmerswho belong to a cooperative plant the soybeans in soil prepared as specified. Each uses a40-acre plot and records the mean yield per acre. The mean and variance for the sampleof the 15 farms are x_bar = 92 and s2 = 285. Test hypothesis to determine if the meanyield for the soybeans is not equal to 103 bushels per acre. Use α = .05.

Answer 1