Question

Breast feeding sometimes results in a temporary loss of bone mass as calcium is depleted in the mother's body to provide for milk production. An investigation gave the following data on total body bone mineral content (g) for a sample of mothers both during breast feeding (B) and in the postweaning period (P).

Subject	1	2	3	4	5	6	7	8	9	10
B	2819	2395	2191	1966	2681	2237	1848	2742	2659	2322
P	2979	2430	2214	2143	2754	2262	1897	2839	2724	2375

Do the data suggest that true average total body bone mineral content during postweaning exceeds that during breast feeding by more than 25 g? State and test the appropriate hypotheses using a significance level of 0.05. (Use a statistical computer package to calculate the P-value. Use μ_P − μ_B. Round your test statistic to two decimal places and the P-value to three decimal places.)

t	=
df	=
P	=

Conclusion

reject H₀

fail to reject H₀   

Answer 1