The histogram in Figure 4.12 shows the weights (in grams) of 72 pennies. Over the histogram, draw a smooth curve that captures its general features. Then classify the distribution according to its number of modes and its symmetry or skewness. What feature of the graph reflects the fact that 35 of the pennies were made before 1983 and consist of 95% copper and 5% zinc whereas the other 37 pennies were made after 1983 and are 2.5% copper and 97.5% zinc?

Transcribed Image Text:

35 20 2.56 2.72 Weights (grams) 2.88 3.04