Would the weight of the quarters in grams be considered a sa

Solution

The weight of the quarters in grams be considered a sample or population . Explaning with a example below...

A data set contains weights (in grams) of quarters made before 1964 and weights ofquarters made after 1964.Sample statistics are listed below.When designing coinvending machines, we must consider the standard deviations of pre-1964 quarters andpost -1964 quarters.Use a 0.05 significance level to test the claim that the weights ofpre-1964 quarters and the weights of post-1964 quarters are from populations with thesame standard deviation.Pre-1964 QuartersPost-1964 Quartersn= 40n= 40s= 0.08700 gs= 0.06194

Requirements Check:The two populations are clearly independent of each other.Quarters made before1964 are not at all related to those made after 1964.The quarters are not matchedor paired in any way.The two samples are simple random samples selected from coins in circulation.The two samples appear to be from populations having normal distributions,based on histograms and a normal quantile plot.Also, there are no outliers.The requirements are satisfied