The Author Online Book Forums are Moving

The Author Online Book Forums will soon redirect to Manning's liveBook and liveVideo. All book forum content will migrate to liveBook's discussion forum and all video forum content will migrate to liveVideo. Log in to liveBook or liveVideo with your Manning credentials to join the discussion!

Thank you for your engagement in the AoF over the years! We look forward to offering you a more enhanced forum experience.

kurio (1) [Avatar] Offline
The explanation of quartiles on p. 190 (points 4 & 5) is not very clear. The example in the paragraph following (Consider the sorted list...) is completely wrong regarding Q1 and Q3. Solving the problem using the TI 84 plus, Q1 = 1.5, and Q3 = 15.
christopher.mitchell (11) [Avatar] Offline
Thank you very much for catching this error! The errata now reflect that the median is omitted from the calculation of the "middle" value for Q1 and Q3, and that the two middle values are averaged if there are an even number of values. In addition, the incorrect Q1 and Q3 values in the following paragraph have been corrected.