17). Following is a frequency distribution of speeds for a sample of 450 automobiles checked by a state police radar system. Speed (miles per hour) frequency 45 -49 10 50-54 40 55-59 150 60 - 64 175 65-69 75 a). How many automobiles are faster than 59 miles per hour? b ). . Compute the mean, median, mode speed of the automobiles and the standard deviation. 19. The following table gives the annual salary distribution for a sample of 22 employees at K& K Home Improvement. Annual Salary Number Receiving Salary $ 17,000 7 18,000 6 21,000 2 24,000 85,000 2 100,000 a). The mean annual salary is The median annual salary is 1 1 b ) . c). The range annual salary is d). The standard deviation value is 11