typos ch11

[lbersh]

11.1:
Current: "Rememer that the simple probability of an..."
Should read: "Remember..."

11.3:
Current: "Let’s create a new data frame that" (incomplete sentence -- stops in the middle)

Current: "What’s the probability for each combination of unhealthy**/healthly**"
Should read: "What’s the probability for each combination of unhealthy/healthy"