Reference no: EM132855983

The yield of a grain, Y (t/ha), appears to be linearly related to the amount of fertilizer applied, X (kg/ha). An experiment was conducted by applying different amounts of fertilizer (0 to 10 kg/ha) to plots of land and measuring the resulting yields. The following estimated regression line was obtained:
yield = 4.85 + .05(fertilizer)

Which of the following is not correct?

Group of answer choices

• For every additional kg/ha of fertilizer applied, the yield is estimated to increase 0.05 t/ha.
• If fertilizer is applied at 10 kg/ha, the estimated yield is 5.35 t/ha.
• If the current level of fertilizer is changed from 7.0 to 9.0 kg/ha, the yield is estimated to increase by 0.20 t/ha.
• If no fertilizer was used, the yield is estimated to be 4.85 t/ha (note that zero use of fertilizer is within the range of this data).
• To obtain an estimated yield of 5.2 t/ha, you need to apply 7.0 kg/ha of fertilizer.