Question

13.2.1 GO Tutorial Your answer is partially correct. Try again. An article in Environment International (Vol. 18, No. 4, 1992) describes an experiment in which the amount of radon released in showers was investigated. Radon-enriched water was used in the experiment, and six different orifice diameters were tested in shower heads. The data from the experiment are shown in the following table. Orifice Diameter Radon Released (%) 0.37 80 81 83 85 0.51 75 75 79 79 0.71 74 73 76 77 1.02 67 72 74 74 1.40 62 62 67 69 1.99 60 61 64 66 (a) Does the size of the orifice affect the mean percentage of radon released? Use a = 0.05. Round all intermediate calculations to four decimal places (e.g. 12.3456). 30.8518 Since Fo = is in the rejection region, there sufficient evidence to conclude that the mean percentage varies according to orifice diameter. (b) Find bounds on the P-value for the F-statistic in part (a). Use only Table VI of Appendix A. P-values

Answer 1

Applying ANOVA on above data from excel: data-data analysis:

Source of Variation	SS	df	MS	F	P-value	F crit
Between Groups	1092.7083	5	218.5417	29.3017	0.0000	2.7729
Within Groups	134.2500	18	7.4583
Total	1226.9583	23

F0 =29.3017