Frequency, Frequency Tables, and Levels of Measurement · Exercise 2

Fifty part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below:

\begin{array}{|c|c|c|c|}\hline \text{# of Courses} & \text{Frequency} & \text{Relative Frequency} & \text{Cumulative Relative Frequency} \\ \hline \text{1} & \text{30} & \text{0.6} & \\ \hline \text{2} & \text{15} & & \\ \hline \text{3} & & & \\ \hline\end{array}

(a) Fill in the blanks in.
(b) What percent of students take exactly two courses?
(c) What percent of students take one or two courses?

This problem refers to a figure in its source book that isn't reproduced here.

OpenStax, Introductory Statistics 2e · §1.3 Frequency, Frequency Tables, and Levels of Measurement · Exercise 2