Summary Stats

Derived Statemedium

Course · Section 11: Working With Arrays · Lecture 160: The reduce Method

Implement `summaryStats(nums)` returning `{ min, max, avg }` for a non-empty array of numbers.

Input: summaryStats([1,2,3,4])

Output: {"min":1,"max":4,"avg":2.5}

Input: summaryStats([5])

Output: {"min":5,"max":5,"avg":5}

+ 1 hidden test run on Submit.

Common pitfalls

Spreading a very large array into Math.min/max can overflow the call stack; reduce is safer at scale.

Approach & explanation (try first)

Derive the summary in one pass: Math.min/max for the bounds and a reduce-based mean, returned together as { min, max, avg }.

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