obs group g density 1 Control 1 648 2 Control 1 609 3 Control 1 615 4 Control 1
ID: 3314139 • Letter: O
Question
obs
group
g
density
1
Control
1
648
2
Control
1
609
3
Control
1
615
4
Control
1
600
5
Control
1
574
6
Control
1
624
7
Control
1
627
8
Control
1
612
9
Control
1
615
10
Control
1
597
11
Lowjump
2
677
12
Lowjump
2
633
13
Lowjump
2
643
14
Lowjump
2
624
15
Lowjump
2
626
16
Lowjump
2
633
17
Lowjump
2
655
18
Lowjump
2
668
19
Lowjump
2
646
20
Lowjump
2
649
21
Highjump
3
578
22
Highjump
3
581
23
Highjump
3
632
24
Highjump
3
619
25
Highjump
3
625
26
Highjump
3
579
27
Highjump
3
615
28
Highjump
3
631
29
Highjump
3
602
30
Highjump
3
581Many 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/cm) was measured. Here are the data (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 answers for x, s, and t one decimal place) Group Low jump High jump (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.) P= Conclusion: There is Select--B statistically significant difference between the three treatment means at the -05 level
Explanation / Answer
applying one way ANOVA on above:
from above F =11.77
p value =0.0002
as p value is less then 0.05 level ;
there is a statsitically significant............
Groups Count Average Sx Sxbar Control 10 612.1 19.7 6.2 Lowjump 10 645.4 17.5 5.5 Highjump 10 604.3 22.8 7.2Related Questions
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