A magazine published data on the best small firms in a certain year. These were firms which had been publicly traded for at least a year, have a stock price of at least $5 per share, and have reported annual revenue between $5 million and $1 billion. The table below shows the ages of the chief executive officers for the first 62 ranked firms.
Age Frequency Relative Frequency Cumulative Relative
Frequency
40-44 5
45-49 11
50-54 15
55-59 18
60-64 10
65-69 2
70-74 1
(a) What is the frequency for CEO ages between (but not including) 54 and 65? (Enter your answer as a whole number.)
3

Incorrect: Your answer is incorrect.


(b) What percentage of CEOs are 65 years or older? (Round your answer to the nearest whole number.)
08.06

Incorrect: Your answer is incorrect.
%

(c) What is the relative frequency of ages under 50? (Round your answer to two decimal places.)
0.26

Correct: Your answer is correct.


(d) What is the cumulative relative frequency for CEOs younger than 55? (Round your answer to two decimal places.)
.50

Correct: Your answer is correct.