Suppose you want to estimate the weight of infants age 6 - 12 mos. A sample of 50 infants was obtained and the 95 % confidence interval was found to be (4.5kg,8kg)(4.5kg,8kg). Another sample of infants is taken, but the sample size is 150. What effect will this have on the confidence interval?
The new confidence interval will be wider.
The new confidence interval will be approximately the same.
The new confidence interval will be narrower.
The new confidence interval will have approximately the same width, but the center of the interval will be higher.
The new confidence interval will have a higher confidence level.
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