Tomato weights and Fertilizer: Carl the farmerhas three fields of tomatoes, on one he used no fertilizer, inanother he used organic fertilizer, and the third he used achemical fertilizer. He wants to see if there is a difference inthe mean weights of tomatoes from the different fields. The sampledata is given below. The second table gives the results from anANOVA test. Carl claims there is a difference in the mean weightfor all tomatoes between the different fertilizing methods.

Tomato-Weight in Grams

											x
No Fertilizer	123	119	95	97	94	120	114	118	129	128	113.7
Organic Fertilizer	112	127	138	133	140	114	126	134	123	144	129.1
Chemical Fertilizer	115	141	143	134	129	134	135	129	113	148	132.1

ANOVA Results

F	P-value
6.921	0.0037

The Test: Complete the steps in testing theclaim that there is a difference in the mean weight for alltomatoes between the different fertilizing methods.(a) What is thenull hypothesis for this test?

H₀: At least one of the population means isdifferent from the others. H₀:?₁ ? ?₂ ??₃.    H₀: ?₁ =?₂ = ?₃.H₀: ?₃ >?₂ > ?₁.

(b) What is the alternate hypothesis for this test?

H₁: ?₁ ??₂ ? ?₃.H₁: ?₁ =?₂ =?₃.    H₁: ?₃ >?₂ > ?₁.H₁: At least one of the population means isdifferent from the others.

(c) What is the conclusion regarding the null hypothesis at the0.05 significance level?

reject H₀ fail to rejectH₀    

(d) Choose the appropriate concluding statement.

We have proven that all of the mean weights are the same. Thereis sufficient evidence to conclude that the mean weights aredifferent.     There is not enough evidence toconclude that the mean weights are different.

(e) Does your conclusion change at the 0.01 significance level?

Yes No