iPad Sales on a Downward Trajectory

Quarterly sales data for Apple Macs, iPhones, and iPads by Kieran Healy. When Apple released their quarterly estimates earlier in the week, the thing that stood out for me immediately was the revelation that iPad sales declined about 23% from the same quarter last year. Later in the week, two blog posts, one from Dr. Drang and one from Kieran Healy, applied some statistical expertise to show…