A Random Sample of 150 Employees Was Selected

Multiple Choice

A random sample of 150 employees was selected. There are 60 employees older than 30 in the sample. Estimate the proportion of all employees of the company who are older than 30 with a 50% confidence. ​

A) We can be 50% confident that the true proportion of all employees of the company who are older than 30 is 0.4.
B) We can be 50% confident that the true proportion of all employees of the company who are older than 30 falls within the interval (0.334, 0.466) .
C) We can be 50% confident that the true proportion of all employees of the company who are older than 30 falls within the interval (0.322, 0.478) .
D) We can be 50% confident that the true proportion of all employees of the company who are older than 30 falls within the interval (0.38, 0.42) .
E) We can be 50% confident that the true proportion of all employees of the company who are older than 30 falls within the interval (0.36, 0.44) .