Q: The mass of coffee in a randomly chosen jar sold by a certain company may be taken to have a normal distribution with mean 203g and standard deviation 2.5g. The random variable C denotes the mean mass (in grams) of coffee jar per in a random sample of 20 jars, find the value of a such that P(|C - 203| < a) = 0.95.
How to solve this question?
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