SOLUTION: A n A newborn baby has extremely low birth weight (ELBW) if it weighs less than 1000 grams. A study of the health of such children in later years examined a random sample of 219 ch

Question 1130178: A n A newborn baby has extremely low birth weight (ELBW) if it weighs less than 1000 grams. A study of the health of such children in later years examined a random sample of 219 children. Their mean weight at birth was x�= 810 grams. This sample mean is an unbiased estimator of the mean weight μ in the population of all ELBW babies. This means that
A. the sample mean x� will have a distribution that is close to Normal.
B. the average sample mean x�, over all possible samples, is equal to μ.
C. the sample mean x� is always equal to μ.
D. None of the above.

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
B.
Unbiased estimator means that the mean of every possible sample of a given size will equal the parameter being estimated, or here the true mean.

RELATED QUESTIONS
Figures from the Australian Bureau of Statistics and the Royal Alexandra Hospital for... (answered by lynnlo)

a mean of 210.0 case of low birth weight each year. 1. Find the mean number of low... (answered by robertb)

When rats give birth, the weight of each baby varies inversely with the number of young.... (answered by stanbon)

5) The weight of a newborn is a random variable X which has the standard normal... (answered by stanbon,unknown000)

Birth weights are normally distributed with a mean weight of 3285 grams and a standard... (answered by stanbon)

An automatic swing is designed to hold a baby who weighs at least 12 pounds but no more... (answered by josmiceli)

A baby weighs 9 pounds at birth and weighs 15 pounds six months later. Find the... (answered by checkley77,Mathtut)

Gestation Period Mean Birth Weight Standard Deviation Under... (answered by stanbon)

A newborn baby weighed 11 pounds at birth and was 22 inches tall. After 66 months the... (answered by KMST)