A company had 80 employees whose salaries are summarized in the frequency distribution below. Find the standard deviation.What is the standard deviation of the data summarized in the given frequency distribution? SalaryNumber of Employees 5,001 -10,00011 10,001 - 15,000 13 15,001 - 20,00020 20,001 - 25,00017 25,001 - 30,00013 Solution Are you sure the numbers of employees are all correct? They don\'t add up to 80!.