A producer of chocolate bars hypothesizes that his production does not adhere to the weight standard of 100g. As a measure of quality control, he weighs a random sample of 15 bars and obtains the following results in grams:
96.40, 97.64, 98.48, 97.67, 100.11, 95.29, 99.80, 98.80, 100.53, 99.41, 97.64, 101.11, 93.43, 96.99, 97.92.
It is assumed that the production process is standardized in the sense that the variationis controlled to be σ = 2. Is there sufficient evidence to support the producer’s hypothesis? Perform a test at the 5% significance level.
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