Question 3 (1 point) The dot plots show the salaries for the employees at two small companies before a new company head is hired at each company. Select all the statements that must be true. 30 80 130 40 50 60 70 90 100 110 120 salaries at company 1 in thousands of dollars 30 130 40 SO 60 70 80 90 100 110 120 salaries at company 2 in thousands of dollars a The mean and median values of salaries shown in the dot plot for company 2 are the same. The standard deviation of salaries shown in the dot plot for company 2 is greater than the standard deviation of salaries at b company 1. d The median values of salaries shown in the dot plots for the two companies are about the same. The median value of salaries at company 1 will remain unchanged after a company head is hired to have a salary of 500 thousand dollars. The new company head with a salary of 500 thousand dollars will affect the mean value for salaries at company 2 more than the median value for salaries at company 2. e