A study was performed to relate aspects of childhood diet to measurements of bon

Question

A study was performed to relate aspects of childhood diet to measurements of bone density in middle age (50- to 70-year-old) women. The data in Table 4 were reported from a Norwegian study relating cod liver oil supplementation in childhood to bone mineral density (BMD) in the distal forearm.

Table 4. Cod liver oil intake during childhood.

a) The one-way ANOVA test is performed for the four groups and reported in Table 5. Assess whether the mean BMD varies significantly among the four groups at the 5% level.

Explanation / Answer

a)

Hence,

F = MSB/MSW = 0.0122/0.0038 = 3.210526316

As df1 = 3, df2 = 3850, the critical value at 0.05 level is, by table/tchnology,

Fcrit = 2.608

Also, the P value is

Pvalue = 0.022118436

As F > 2.608, and P < 0.05, we reject Ho.

Thus, the mean BMD varies significantly among the four groups at the 5% level. [CONCLUSION]

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