Why doesnt gravity play a role if it rolls on surface
When a ball rolls down a incline plane it gains speed,because of gravity,when rolling up it losees speed because of gravity. Why doesn't gravity play a role when it rolls on a horizontal surface?
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It was found that in a sample of 90 teenage boys, 70% of them have received speeding tickets. What is the 90% confidence interval of the true proportion of teenage boys who have received speeding tickets?
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