5
QuizMultiple Choice

Range and Interquartile Range

Question 5 • Concepts in Probability and Statistics A

Kate recorded the number of minutes she read each day for the last two weeks in the table. Week 1Week 2Sunday8555Monday3550Tuesday5045Wednesday6045Thursday3040Friday3530Saturday5050How can Kate figure out which week had the larger range in minutes read?

Answer
A
1. Order the minutes for each week.2. Find the range for each week. 3. Compare the ranges. Week 1 had the larger range in minutes.
B
1. Order the minutes for each week.2. Find the range for each week.3. Compare the ranges. Week 2 had the larger range in minutes.
C
1. Find the difference between the Sunday and Saturday minutes for each week.2. Compare the ranges.Week 1 had the larger range in minutes.
D
1. Find the difference between the Sunday and Saturday minutes for each week.2. Compare the ranges.Week 2 had the larger range in minutes.

Explanation

For each week, the range is the greatest number of minutes minus the least. Week 1’s range is 85 − 30 = 55 minutes, while Week 2’s range is 55 − 30 = 25 minutes. Comparing the ranges shows that Week 1 had the larger range, so Kate should order the minutes, find each range, and compare them.

AI-written and checked against the verified answer.

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