Breast feeding sometimes results in a temporary loss of bone mass as calcium is

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). 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 mu_P - mu_B. Round your test statistic to two decimal places and your P-value to three decimal places.) t = df = P-value = Conclusion Fail to reject H_0. Reject H_0. You may need to use the appropriate table in Appendix A to answer this question. A state health web site provides information on the cost-to-charge ratio (the percentage of billed charges that are actual costs to the

Explanation / Answer

8. The samples are dependent so we will use paired t - test here.

The statistical software output for this problem is:

Paired T hypothesis test:
D = 1 - 2 : Mean of the difference between P and B
H0 : D = 25
HA : D > 25
Hypothesis test results:

Hence,

t = 10.32

df = 9

p - vlaue = 0.000

9. The samples are dependent so we will use paired t - test here.

The statistical software output for this problem is:

Paired T hypothesis test:
D = 1 - 2 : Mean of the difference between 2002 Inpatient Raio and 2002 Outpatient Ratio
H0 : D = 0
HA : D 0
Hypothesis test results:

Hence,

t = 2.63

df = 5

p - value = 0.046

Difference Mean Std. Err. DF T-Stat P-value P - B 120.3 9.2364616 9 10.317804 <0.0001

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