Many studies have suggested that there is a link between exercise and healthy bo

Question

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: a control 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 mg/cm3 ) was measured. Here are the data. data187.dat

(b) Run the analysis of variance. Report the F statistic with its degrees of freedom and P-value. What do you conclude? (Round your test statistic to two decimal places and your P-value to three decimal places.)

Group n s Control Low jump High jump

Explanation / Answer

applying one way ANOVA on above data:

b)

F =3.54

p value =0.043

as p value is less than 0.05 level

conclusion: There is a statistically significant difference between the three treatment means at the = .05 level

Groups n xbar s sx Control 10 606.4 37.9 12.0 Lowjump 10 638.2 23.2 7.3 Highjump 10 611.9 21.7 6.9

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