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2 weeks ago
A bicycle shop equips 60% of their bikes with a water bottle holder. 55% of the bikes they sell have a kickstand attached to the bike. 34% of the bikes sold have both features.

We can tell that these two features are independent because...

▸ These two features don't have anything to do with each other, so we know they're independent.

▸ The probability of having a kickstand given that you have a water bottle (56.7%) is about equal to the probability of having a kickstand (55%).

▸ The probability of having either feature (81%) doesn't equal the probability of having just one feature (60% and 55%).

▸ The probability of having both features is not zero; it is 34%.

▸ The probability of having both features (34%) does not equal the probability of having neither feature (19%).
Textbook 

Stats: Modeling the World


Edition: 4th
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The probability of having a kickstand given that you have a water bottle (56.7%) is about equal to the probability of having a kickstand (55%).
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