1. Newborn weight. A study takes a SRS from a population of full-term infants. The standard...
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1. Newborn weight. A study takes a SRS from a population of full-term infants. The standard deviation of birth weights in this population is 2 pounds. Calculate 95% confidence intervals for for samples in which: a) n = 81 and mean = 7.0 pounds b) n 9 and mean = 7.0 pounds c) Which sample provides the most precise estimate of the mean birth weight? d) Interpret the Cl you computed in part a). 2. P-value and confidence interval. A two-sided test of HO: =0 yields a P-value of 0.03. Will the corresponding 95% confidence interval for include 0 in its midst? Will the 99% confidence interval for include 0? Explain your reasoning in each instance. 1. Newborn weight. A study takes a SRS from a population of full-term infants. The standard deviation of birth weights in this population is 2 pounds. Calculate 95% confidence intervals for for samples in which: a) n = 81 and mean = 7.0 pounds b) n 9 and mean = 7.0 pounds c) Which sample provides the most precise estimate of the mean birth weight? d) Interpret the Cl you computed in part a). 2. P-value and confidence interval. A two-sided test of HO: =0 yields a P-value of 0.03. Will the corresponding 95% confidence interval for include 0 in its midst? Will the 99% confidence interval for include 0? Explain your reasoning in each instance.
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