The capacitances of certain electronic components have a normal distribution with a mean = 174 and

Question:

The capacitances of certain electronic components have a normal with a mean μ = 174 and a standard deviation σ = 2.8. If an engineer randomly selects a sample of n = 30 components and measures their capacitances, what is the probability that the engineer's point estimate of the mean μ will be within the interval (173, 175)? Distribution
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