Question

# A statistical procedure to estimate the mean shell thickness of eggs from chickens contaminated with PCBs...

A statistical procedure to estimate the mean shell thickness of eggs from chickens contaminated with PCBs obtains a point estimate of 0.70 mm and an estimated error margin of 0.05 mm. This means:

 The standard deviation of actual shell thickness in the sample was 0.05 mm. We are 95% confident that the sample mean shell thickness is 0.70mm with a margin of 0.05mm. An estimate of the standard deviation of the sample mean shell thickness over repeated samples is 0.05 mm The standard deviation of the population mean over all eggs is about 0.05 mm. A 95% confidence interval for the sample mean shell thickness is 0.70mm ± 5mm

Solution :

Given that,

A statistical procedure to estimate the mean shell thickness of eggs from chickens contaminated with PCBs

obtains a point estimate of 0.70 mm and an estimated error margin of 0.05 mm .

This means,

We are 95% confident that the sample mean shell thickness is 0.70mm with a margin of 0.05mm.

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