Frequency Tables and Dot Plots

Sometimes it is helpful to know how many times a given data point occurs in the set of numbers. This is easy to find out if the data is organized in a frequency table or a dot plot. Watch the video and complete the corresponding interactive exercises.

Practice

Estimate center using dot plots - Questions

1. Ms. Munoz had students in three class periods write essays for a diagnostic test. The following dot plots shows the scores from each class. Each dot represents a different student's score.

Order the class periods from least to greatest typical score.

Put the graph with the least typical value on top.

2. The following dot plot shows the number of weekly challenge questions each of the 30 members the Math Bowl team answered correctly last season. Each dot represents a different member.

Which of the following is a typical number of challenge questions one member answered correctly?

Choose 1 answer:

(A) 0 questions

(B) 3 questions

(D) 10 questions

3. The following dot plot shows the number of cavities each of Dr. Vance's 63 patients had last month. Each dot represents a different patient.

Which of the following is a typical number of cavities one patient had?

Choose 1 answer:

(A) 2 cavities

(B) 5 cavities

(D) 15 cavities

4. The following dot plots show the numbers of people per table at Kingsley's Bingo Hall on three different nights. Each dot represents one of the 20 tables.

Order the nights from least to greatest typical number of people per table.

Put the graph with the least typical value on top.