22322674 Save Homework: Chapter 3 Homework 4/ 22 of 30 (30 complete) HW Score: 6

Question

22322674 Save Homework: Chapter 3 Homework 4/ 22 of 30 (30 complete) HW Score: 67.44%, 20.23 of 30 pts Score: 0 of 1 pt Question Help * 3.4.25 308 413 o The following data represent the monthly phone use, in minutes, of a customer enrolled in a fraud prevention program for the past 20 months. The 476 533 phone company decides to use the upper fence as the cutol point for the number of minutes at which the customer should be contacted What s the cutoff point? 378 333 528 341 301 347 343 537 485 411 448 514 387 394 417 372 The cutoff point is minutes (Round to the nearest minute.) Enter your answer in the answer box and then click Check Answer All parts showing Clear All 4.95-15*268 8.97 ere to search

Explanation / Answer

Answer to the question)

The formula of Upper fence is as follows

Upper fence = Q3 + 1.5 * IQR

.

Thus we calculate the thrid quartile , first quartile and the inter quartile range of this data

Using the formula : =QUARTILE(A1:A20,1) in excel we get Q1 = 346

and using the formula =QUARTILE(A1:A20,3) in excel we get Q 3 = 478.25

.

Thus IQR = Q3 - Q1

IQR = 478.25 - 346 = 132.25

.

On plugging the values we get

Upper Fence = 478.25 + 1.5 * 132.25

Upper fence = 676.625

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