Charcot arthropathy is a rare neuropathic joint complication where weight bearing joints, typically in the foot and ankle, break down with pathologic bone fracturing, dislocations, and deformities which often lead to amputation. This disease was first observed in the 1800's in individuals with syphilis but now individuals with diabetes are at the highest risk of developing this condition. Current prevalence estimates upwards of 7.5% of individuals with diabetes are diagnosed with Charcot arthropathy. What is the mean and standard deviation for individuals with Charcot arthropathy among a group of 130 individuals with diabetes assuming this 7.5% prevalence rate is correct?

1. a. = 8.25, = 3.00
2. b. = 9.75, = 9.02
3. c. = 8.25, = 9.02
4. d. = 7.75, = 3.75
5. e. = 9.75, = 3.00