This paper studies the asymptotic power of tests of sphericity against perturbations in a single unknown direction as both the dimensionality of the data and the number of observations go to infinity.

Canada Post workers are on strike for the second time in less than a year after Ottawa announced it would be ending home mail delivery. Scroll through the Star’s live coverage.

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The Grammy Award-winning performer has been forced to cancel shows in Hawaii after walking off stage in the middle of a performance on Friday. Swims shared a message with Instagram followers to say he ...