4. If the average wait time is 28 minutes with a standard deviation of 2.8 minutes, determine the percentage of patrons who wait less than 32 minutes for their main course to be brought to their tables.
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The z-score is a measure of how many standard deviations an element is from the mean. It is calculated as: Z = (X - μ) / σ where: X = value (32 minutes) μ = mean (28 minutes) σ = standard deviation (2.8 minutes) So, Z = (32 - 28) / 2.8 = 1.43 Show more…
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