One-Sample Study (tap-only)

a.Estimate (using a 95% confidence interval) the true mean weight gain. Interpret.

b.Abrams et al. (2000) reported that the healthy pregnant women are generally advised to limit weight gain to approximately 26 pounds. Is the weight gain different in the sample of women who drank only tap water? Use statistical inference to justify your answer.

2a,b The TTEST Procedure Variable: wtgain N Mean Std Dev |Std Err Minimum |Maximum 270 40.0107 5.7299 0.3487 24.5000 63.9000 95% Mean 95% CL Mean Std Dev CL Std Dev 40.0107 39.3242 40.6973 5.7299 5.2840 6.2588 DF t Value Pr > It| 269 40. 18 <.0001 distribution of wtgain with confidence interval for mean normal kernel percent oo o>