chemistry

The aspirin content in the analgesic tablets is determined from 120 samples to have a ean of 250 mg with a standard deviation of 5 mg. from a production line, what percentage of the tablets are expected to contain between 243 and 262 mg of aspirin?What is the 95 % confidence interval with 120 samples? If in a random test of 5 samples from the production line, what is the 95% confidence interval?

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