2. Describing Data with Tables and Graphs
Frequency Distributions
Struggling with Statistics for Business?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
An economist is analyzing the monthly unemployment rates (as a %) across different cities. The lowest was 16% and the highest was 71%. Without constructing a table, find the class width if this data is divided into 7 classes. Then write the lower and upper class limits for each class.
A
Class width = 7; lower class limits = 16, 23, 30, 37, 44, 51, 58, 65; Upper class limits = 24, 32, 40, 48, 56, 64, 72
B
Class width = 7; lower class limits = 16, 24, 32, 40, 48, 56, 64; Upper class limits = 24, 32, 40, 48, 56, 64, 72
C
Class width = 8; lower class limits = 16, 24, 32, 40, 48, 56, 64; Upper class limits = 23, 31, 39, 47, 55, 63, 71
D
Class width = 8; lower class limits = 16, 24, 32, 40, 48, 56, 64; Upper class limits = 24, 32, 40, 48, 56, 64, 72
Verified step by step guidance1
Identify the range of the data by subtracting the lowest value from the highest value: Range = 71% - 16%.
Determine the class width by dividing the range by the number of classes. Use the formula: Class Width = (Range) / (Number of Classes).
Round up the class width to the nearest whole number if necessary, as class width should be a whole number.
Calculate the lower class limits by starting with the lowest value (16%) and adding the class width successively.
Calculate the upper class limits by subtracting 1 from the next lower class limit or adding the class width to each lower class limit and subtracting 1.
6:38mWatch next
Master Intro to Frequency Distributions with a bite sized video explanation from Patrick
Start learning
