deviation. Use a TI-83 Plus/TI84 Plus calculator. Round the answers to at least one decimal place. class limits Murder Rates The data represent the murder rate per 100,000 individuals in a sample of selected cities in the United States. Find the variance and standard Frequency 1%.. 511 3 00 12-18 11 19-25 15 26-32 6 E 33-39 2 40-46 7 I: Send data in Excel :3: Variance = l-ll_-I{l D x 8 Standard deviation = D I = I'll