Exam PCED-30-02 Topic 1 Question 42 Discussion

Actual exam question for Python Institute's PCED-30-02 exam
Question #: 42
Topic #: 1
You are given two lists representing daily page views and sign-ups on a website:
views = [120, 130, 128, 700, 115, 123, 119, 680, 122]
signups = [12, 15, 13, 50, 11, 14, 10, 55, 13]
You want to:
- remove outliers (views > 600), and
- calculate correlation between the cleaned lists.
Which code accomplishes this correctly? Select the best answer.

Suggested Answer: D Vote an answer

It converts the lists to NumPy arrays, builds a boolean mask based on the views threshold to remove outliers, applies the same mask to both arrays so they stay aligned, and then computes the correlation on the cleaned pairs using np.corrcoef.

by Isaac at May 09, 2026, 08:10 PM

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