For Both Problems Include All Steps of Hypothesis Testing A nutritional expert r

Question

For Both Problems Include All Steps of Hypothesis Testing A nutritional expert randomly assigned a sample of 18 bicyclers to three groups. Group A was instructed to eat as they normally do. Group B was given a vitamin supplement. Group C was put on a diet of health foods. The expert subsequently recorded the number of minutes it took each person to ride 6 miles. Determine if there is an overall effect of Group. Use a.05 alpha level. What do you conclude? 1. 17 20 18 19 21 20 Group B 10 13 14 12 16 14 Group C 13 14 12 15 16

Explanation / Answer

at 0.05 level of significance we can conclude that mean of three groups are not same.

at 0.05 level we can conclude that the mean of the groups are same.

Anova: Single Factor SUMMARY Groups Count Sum Average Variance Group A 6 115 19.16667 2.166667 Group B 6 79 13.16667 4.166667 Group C 6 81 13.5 3.5 ANOVA Source of Variation SS df MS F P-value F crit Between Groups 136.4444 2 68.22222 20.81356 4.71E-05 3.68232 Within Groups 49.16667 15 3.277778 Total 185.6111 17

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