MAT 111 2.1

What’s the difference between class limits and class boundaries?

Class limits are the least and greatest numbers that can belong to the class. Class boundaries are the numbers that separate classes without forming gaps between them. For integer​ data, the corresponding class limits and class boundaries differ by 0.5.

What is the difference between relative frequency and cumulative​ frequency?

Relative frequency of a class is the percentage of the data that falls in that​ class, while cumulative frequency of a class is the sum of the frequencies of that class and all previous classes.

After constructing an expanded frequency​ distribution, what should the sum of the relative frequencies​ be? Explain.

\n

**A**

The sum should be​ 1, since in the sum of the relative frequencies ∑fn​, the numerator will be n=∑f.

What is the difference between a frequency polygon and an​ ogive?

A frequency polygon displays class frequencies while an ogive displays cumulative frequencies.

Determine whether the statement is true or false. If it is​ false, rewrite it as a true statement.

In a frequency​ distribution, the class width is the distance between the lower and upper limits of a class.

False. In a frequency​ distribution, the class width is the distance between the lower or upper limits of consecutive classes.