2. Data Representation

Frequency Tables — Quiz

Test your understanding of frequency tables with 5 practice questions.

Practice Questions

Question 1

When constructing a grouped frequency table for continuous numerical data, such as heights or weights, which of the following is the most critical consideration to ensure accurate representation and avoid misinterpretation?

Question 2

A survey of $120$ households recorded the number of televisions owned. The data showed that $30$ households had $1$ TV, $50$ households had $2$ TVs, $25$ households had $3$ TVs, and the remaining households had $4$ TVs. What is the relative frequency of households that own $4$ TVs?

Question 3

Consider a dataset of student scores on a $50$-point quiz: $[35, 42, 28, 48, 39, 31, 45, 22, 40, 37]$. If a grouped frequency table is constructed with class intervals of width $10$, starting from $20-29$, what is the frequency for the class interval $30-39$?

Question 4

A market researcher is analyzing the income levels of $500$ individuals, with incomes ranging from $$\$15,000$ to $\$150,000$$ per year. Which of the following class intervals would be most appropriate for a grouped frequency table to effectively display this data, considering the wide range and potential for skewness?

Question 5

In a grouped frequency table, if the class intervals are defined as $10-19$, $20-29$, $30-39$, what is the precise upper class boundary for the interval $20-29$?