Update lesson
Merge branch 'master' into topics_in_glm
minor changes
Adjusting an answer test in Conditional Probability
Update lesson.yaml

Correct misspelling of 'equivalent'
Fix typo in statinf Power.
fixed wording in variance lesson
Merge pull request #75 from jonmcalder/patch-1

Update lesson.yaml
completed notes for TFC, a prototype "topics in glm" lesson.
Merge branch 'master' into topics_in_glm