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NPTEL — National Programme on Technology Enhanced Learning

Lecture 18 : Range, Interquartile Range and Quartile Deviation

Shows why distributions with a similar centre can have different spreads. The inspected examples calculate the range and interquartile range in R and discuss how these summaries use different parts of the observations.

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NPTEL — National Programme on Technology Enhanced Learning Speaker not established foundation Duration unknown

Why it is here

Adds a description of spread to an otherwise incomplete report of an average or median.

Selection basis: institutional collection. Reason checked 2026-11-07 by agent.

Source and access

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1024-byte range from the officially listed MP4, HTTP 206, matching content range and MP4 header. No full playback or decoding; YouTube availability is unknown.

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accessible · official media range
Checked
2026-11-07
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Level basis
Editorial judgement, not an official difficulty label. The checked material uses ordered data and straightforward differences between values.
Transcript
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Provenance and reuse

NPTEL — National Programme on Technology Enhanced Learning; original source https://nptel.ac.in/courses/111104120. Link to official source, title, attribution and original atlas annotations. Do not copy source code, rehost video, or copy full course prose into the public export.. Links, factual metadata and original navigation annotations only. No source page, transcript, image, video or restricted platform metadata is included in the reusable export.

  1. nptel-download-inventory-d70acff405a6a989

    Official download inventory maps this course and lesson to the MP4 alternative; source title agreement recorded. Retrieved 2026-11-07.

  2. nptel-media-3ec2e169c3baeb00

    The first 1 KiB of the official source-listed MP4 was accessible with a valid MP4 header. This is not full playback, decoding, watching, or an assurance about every byte. Retrieved 2026-11-07.

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    ordered lecture title and parent-course syllabus; no video viewed or transcript read Retrieved 2026-11-07.

  4. nptel-transcript-111104120-18

    Selected excerpts only: segment 0 (header) first 1231 characters; segment 1 ((01:56) first 1400 characters; segment 14 ((31:12) first 419 characters; segment 26 ((43:17) first 1313 characters. No complete transcript reading or full video viewing claimed. Retrieved 2026-11-07.

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