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Regression analysis was applied between sales data (y in $1000s) and advertising data (x in $100s) and the following information was obtained. The critical t value for testing the significance of the slope, at a .05 level of significance, is
Trench Warfare
A method of combat during World War I in which opposing troops fought from systems of trenches dug into the ground.
Battle of the Marne
A significant First World War battle near the Marne River in France in 1914, which resulted in a victory for the Allies, halting the German advance towards Paris.
Triple Entente
An alliance formed in the early 20th century between France, Russia, and Great Britain, which played a significant role in the build-up to World War I.
Triple Alliance
An agreement made in 1882 between Germany, Austria-Hungary, and Italy, forming a powerful bloc that stood until the beginning of World War I.
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