#### Answer

Tally: four sticks
Class Frequency = $4$

#### Work Step by Step

Identify and count the numbers that fall within the interval $16-20$.
They are: $17, 20, 20,$ and $18$.
Thus, tally will be four sticks, and the Class Frequency is $4$.

Published by
Pearson

ISBN 10:
0321825535

ISBN 13:
978-0-32182-553-7

Tally: four sticks
Class Frequency = $4$

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