The US local airport keeps track of the percentage of flights arriving within 15 minutes of their scheduled arrivals.The stem-and-leaf plot of the data for one year is below: What would be the class length for creating the frequency histogram?
A)1.4
B)0.8
C)2.7
D)1.7
E)2.3

Question

The US local airport keeps track of the percentage of flights arriving within 15 minutes of their scheduled arrivals.The stem-and-leaf plot of the data for one year is below:  What would be the class length for creating the frequency histogram?
A)1.4 
B)0.8 
C)2.7 
D)1.7 
E)2.3

Quizplus · Accepted Answer

Since the stem-and-leaf plot has a range of 9.8-12.0, the class length can be calculated as  (12.0-9.8)/6 = 0.37 (rounded to 0.4). However, we want to choose a nice round number, which is close to 0.4. From the options given, D) 1.7 is the closest choice to 0.4. Therefore, the class length for creating the frequency histogram would be 1.7.

The US Local Airport Keeps Track of the Percentage of Flights