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 (9) 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 2266 2822 1900 25452646 2147 2206 2820 2116 2788 P 2304 2894 1996 2594 2837 2320 2392 2841 2174 2803 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 Hg = 4p - Hg. Round your test statistic to two decimal places and the P-value to three decimal places.) t = 2.63 df = 5 P= .046

Answer 1

B	P	Difference
2266	2034	-232
2822	2894	72
1900	1996	96
2545	2594	49
2646	2837	191
2147	2320	173
2206	2392	186
2820	2841	21
2116	2174	58
2788	2803	15
	25.000	hypothesized value
	2,488.50	mean P
	2,425.60	mean B
	62.900	mean difference (P - B)
	122.971	std. dev.
	38.887	std. error
	10	n
	9	df
	0.97	t
	.1776	p-value (one-tailed, upper)