Told You So... Margins of Error

Hate to say I told you so, but I did. Today, in Nanos' 'Leadership Index' Harper is up a whopping 15%, more than making up for the amount he dropped. Since the attacks ads are still running, I guess those ads weren't as effective as some thought, eh?Sure some will say it was turned around because of the CPC's job in highlighting the Liberals attributing something to Harper that he didn't say.

Margins of Error

Margins of error are additive. If you were going on a trip, and were asked to measure the length, width and height of your bag to determine its length + width + height to ensure its appropriately sized. If you planned ahead you might have a tape measure with you, if not you can borrow one from someone else. Suppose your measurements are:Length (L) = 65cmWidth (W) = 30cmHeight (H) = 120cmTo