STATISTICS

Answer the given problem. Analyze what tool should be used.

1. In a biological experiment, four concentrations of a certain chemical are used to enhance the growth of a certain type of a plant over a specified period of time. The following growth data, in centimeters, were recorded for the plants that survived:

CONCENTRATION

1	2	3	4
8.2	7.7	6.9	6.8
8.7	8.4	5.8	7.3
9.4	8.6	7.2	6.4
9.2	8.1	6.8	6.9
	8.0	7.4	7.1
		6.1

Test for the homogeneity of variances. Use a 0.01 level of significance.

Follow the steps in solving the problem, namely:

1. Hypothesis ex. H0: = 9.0 H1: 9.0 2. Level of significance ex. = 0.01 3. Test Statistic ex. z = x - 0 / / n 4. Critical Region ex. graph and /2 = +-0.025 5. Computation ex. compute using formula 6. Decision ex. accept H0 since the computed z-value falls in the region of acceptance. 7. Conclusion ex. there is no reason to believe the ...