My Notes o Ask Your Teacher 1. O -3333 points MIntroStat8 12E 047 Many studies h

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My Notes o Ask Your Teacher 1. O -3333 points MIntroStat8 12E 047 Many studies have suggested that there is a link between exercise and healthy bones. Exercise stresses the bones and this causes them to get stronger. One study examined the effect of jumping on the bone density of growing rats. There were three treatments ontrol with no jumping, a low-jump condition (the jump height was 30 centimeters), and a high jump condition (60 centimeters). After 8 weeks of 10 jumps per day, 5 days per week, the bone density of the rats (expressed in was measured. Here are the data data 198 dat a) Make a table giving the sample size, mean, and standard deviation for each group of rats. Consider whether or not it is reasonable to pool the variances. (Round your or x, s, and to one decimal pl Control High (b) Run the analysis of variance. Report the F statistic with its degrees of freedom and Pvalue. What do you conclude? (Round your test statistic to two decimal places and your P-value to three decimal places.) Conclusion: There is Select statistically significant difference between the three treatment means at the a .05 level Submit Answer Isave Progresa Another Version

Explanation / Answer

from above

from above F=8.72

P value =0.001

there is a statistically...

Groups n xbar s sxbar control 10 603.2 16.66533 5.270041 Low jump 10 639.8 25.65498 8.112816 High Jump 10 605.9 22.24835 7.035545 ANOVA Source of Variation SS df MS F P-value F crit Between Groups 8320.2 2 4160.1 8.721993 0.001197 3.354131 Within Groups 12878.1 27 476.9667 Total 21198.3 29

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