Scores made by employees on a normal dexterity test are normally distributed with a mean of 600 and a variance of 10,000. What proportion of employees take the test score below 300? An employee is about to take the test. What is the probability that the employee's score will be 850 or more? What proportion of employees scored between 450 and 550? Management has decided that those employees whose scores are among the top 10% will be considered for promotion to a better job position. What score must an employee make in order to be eligible for promotion? Suppose that management decides to consider for promotion only those employees who make a score of 800 or more. What percentage of the employees will be eligible to be considered for promotion