The age at inauguration (in years) of the U.S. presidents from Washington to Oba

Question

The age at inauguration (in years) of the U.S. presidents from Washington to Obama is given in the graph below. What kind of graph is this? How many presidents are represented in this graph? Describe the shape of this distribution. What percentage of U.S. presidents was younger than 50 years old at the time of inauguration? What percentage of U.S. presidents were at least 65 years of age when inaugurated? T. Roosevelt was the president who was youngest when inaugurated. Based on the graph above, can you give the age at inauguration for T. Roosevelt? If yes, give the age. If no explain why not.

Explanation / Answer

Result:

1).

a). Histogram.

b). 2+7+14+11+7+3 = 44

c). Bell shaped or Approximately symmetrical distribution.

d). (9/44)*100 =20.45%

e).

(3/44)*100 =6.82%

f).

Based on the graph we can only say age at inauguration for T.Roosevelt in the range 40-45.

We can not say the exact data point from the histogram.

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