Solving Statistic Problem: Low Tire Pressure & Tread Depth

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SUMMARY

The discussion centers on a conditional probability problem regarding tire pressure and tread depth. It is established that if a tire has low air pressure, there is a 22% probability that its tread depth is less than 1/8 of an inch. Given that 75 out of 100 tires have a tread depth greater than 1/8 of an inch, it follows that 25 tires have a tread depth less than 1/8 of an inch, indicating they likely have low air pressure. The solution involves calculating the number of tires with low air pressure based on the provided probabilities.

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  • Understanding of conditional probability
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  • Familiarity with tire maintenance standards
  • Ability to interpret statistical data
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Automotive technicians, students studying statistics, and professionals involved in vehicle safety and maintenance will benefit from this discussion.

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Homework Statement



when checking tire tread depth at an automobile repair ship, it has been determined that if a tire has low air pressure, there is a 22% probability that its tread depth is less than 1/8 of an inch. on a given day 75 out of 100 tires were found to have a tread depth greater than 1/8 of an inch. how many tiras had low air pressure?

Homework Equations





The Attempt at a Solution



thank for the help...
 
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75 out of 100 tires were found to have a tread depth greater than 1/8 of an inch
So 25 tires had less than 1/8 of an inch, and clearly they have low pressure.

Then "22% probability that its tread depth is less than 1/8 of an inch" of the population of low pressure tires.
 
inchuljang said:

Homework Statement



when checking tire tread depth at an automobile repair ship, it has been determined that if a tire has low air pressure, there is a 22% probability that its tread depth is less than 1/8 of an inch. on a given day 75 out of 100 tires were found to have a tread depth greater than 1/8 of an inch. how many tiras had low air pressure?

Homework Equations





The Attempt at a Solution



thank for the help...
This seems like a conditional probability question. Have you had any thoughts on the problem?
 

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