The diagram shows 48 visitors to Library A and 50 visitors to Library B on one day. $A$ $B$ \(45

Question

The diagram shows 48 visitors to Library A and 50 visitors to Library B on one day. $A$ $B$ $45$ $46$ $47$ $48$ $49$ $50$ $\text{Visitors}$ A reader says Library B had about twice as many visitors as Library A. Explain how the diagram may have caused this impression. Calculate the percentage by which the number at B exceeded the number at A, correct to 1 decimal place. State one change that would give a fairer visual comparison.

Accepted Answer

(a) The axis starts at 45 and exaggerates the difference. (b) $4.2\%$. (c) Start the frequency axis at zero.

Interpreting a truncated scale

Interpreting a truncated scale

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