9. A researcher computes the standard deviation of the variable "prior number of arrests" for a sample of inmates in a minimum security prison and a sample of inmates in a maximum security prison. The standard deviation for the maximum security prison inmates is twice the size of the standard deviation for the minimum security prison inmates. What is one conclusion you can draw about the prior criminal history of the two samples of inmates?

10. Assume that one individual was selected from the sample of maximum security inmates in question #9. Let's also assume that this inmate was exactly two standard deviations greater than the mean. If the inmate had 13 prior arrests and the standard deviation was 3, what is the mean number of prior arrests within the maximum security inmate sample?

11. Using the information in question #10, what proportion of the sample of maximum security inmates had greater than 13 prior arrests?