The time required to assemble an electronic component is normally distributed with a mean of 12 minutes and a standard deviation of 1.5 min. Find the probability that the time required to assemble all nine components (i.e. the total assembly time) is greater than 117 minutes.
Added by Anthony B.
Step 1
The mean total assembly time (μ_total) is simply the mean assembly time per component (μ) multiplied by the number of components (n), so μ_total = μ * n = 12 min/component * 9 components = 108 minutes. The standard deviation of the total assembly time (σ_total) Show more…
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