The Numbers of Hours Worked (Per Week) by 400 Statistics $$\begin{array} { l l } \text { Number of hours } & \text { Frequency } \\0 - 9 & 20 \\10 - 19 & 80 \\20 - 29 & 200 \\30 - 39 & 100\end{array}$$

question 63

Multiple Choice

The numbers of hours worked (per week) by 400 statistics students are shown below. $$\begin{array} { l l } \text { Number of hours } & \text { Frequency } \\0 - 9 & 20 \\10 - 19 & 80 \\20 - 29 & 200 \\30 - 39 & 100\end{array}$$ The cumulative percent frequency for < 29 hours is

• A) 50.
• B) 75.
• C) 200.
• D) 300.

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