You have data on the durations of calls to a call center. Generate a plan for how you would code and analyze these data. Explain a plausible scenario for what the distribution of these durations might look like. How could you test, even graphically, whether your expectations are borne out?

Data Science Interview QuestionsCategory: Data ScienceYou have data on the durations of calls to a call center. Generate a plan for how you would code and analyze these data. Explain a plausible scenario for what the distribution of these durations might look like. How could you test, even graphically, whether your expectations are borne out?
1 Answers
MockInterview Staff answered 6 years ago
  1. Exploratory data analysis
  • Histogram of durations
  • histogram of durations per service type, per day of week, per hours of day (durations can be systematically longer from 10am to 1pm for instance), per employee…
  1. Distribution: lognormal?
  2. Test graphically with QQ plot: sample quantiles of log(durations)log⁡(durations) Vs normal quantiles

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