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StatisticsQ&A LibraryInterval for One Sample Continuous OutcomeAn investigator wants to estimate the mean birth weight of infants bornfull term to mothers who are 19 years of age or youngerThe mean birth weight of infants born full term to mothers 20 years ofage and older is 351Qg with a standard deviation of 385gA. How many women 19 years of age or younger must be enrolled in the study toensure that a 95% confidence interval estimate of the mean birth weight of their196infants has a margin of error not exceeding 100g?B. How many do you need if 5% deliver pre-term?ONES & BARTLETT LEARNING2011 Jones & Bartlett Learning, LLCQuestion

Asked Oct 28, 2019

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Problem 1

Step 1

**Given information:**

Mean, *µ=*3,510

Standard deviation, *σ=*385

Step 2

**Computation of number of women 19 years of age or younger enrolled in the study:**

Using the EXCEL formula, “=NORM.S.INV(C5)”, the value of *z* for 95% confidence level is 1.96.

To ensure that the 95% confidence interval estimate...

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