Question: A researcher has developed a new analytical method to determine the percent by mass of iron in solids. To test the new method, the researcher

A researcher has developed a new analytical method to determine the percent by mass of iron in solids. To test the new method, the researcher purchases a standard reference material sample that is 3.53% iron by mass. Analysis of the iron standard returns values of 3.45%, 3.52%, 3.47%, 3.48%, and 3.51%.

Is the mean for these five trials significantly different from the accepted value at the 95% confidence interval.

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