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At the 5% significance level, test whether the population mean mass is 500 grams.
Mathematics 9709 · AS & A Level · Hypothesis testing
Hypothesis testing — practice question
The stated mean mass of Trueleaf tea packets is 500 grams. An inspector wants to check whether this figure is accurate. He measures 60 packets chosen at random and records the mass, $x$ grams, of each packet. The data are summarised by: $n = 60$, $\sum x = 29970$, $\sum x^2 = 14970300$.