Friday

December 19, 2014

December 19, 2014

Posted by **kate** on Thursday, August 23, 2007 at 1:18am.

" slow drivers" contribute to road rage problems and the officer noticed that 2 of the 150 drivers in her survey caused problems for other drivers beacuse of their slow speed. Use normal distrubution and this infomation to decribe a "slow" driver in terms of their driving.

thanks

- Maths -
**economyst**, Thursday, August 23, 2007 at 10:04amI think I see what you are after here; I think you are trying to find the speed definition of "slow"

2 out of 150 is .0133. That is 1.33% of drivers are slow. Ergo, 1-.0133=.9866 are not slow. Look up .9866 in a normal distribution table (probably found in your stats book). I get 2.22. Meaning that 1.33% of the population are more than 2.22 standard deviations away from the mean (of a normally distributed population). So 8*2.22 = 17.76. And 56-17.76 = 38.24. Meaning, drivers going below 38.24 km/h are "slow drivers".

By the way, in my opinion, 150 drivers is too small of a sample size to determine the number of "slow" drivers. But this is an issue for another day.

**Answer this Question**

**Related Questions**

maths - the police officer also gathered data on the speedsx, in kilometers per ...

Physics - A speeding motorcyclist is traveling at a constant speed of 31.1 m/s ...

PHYSICS-URGENT HELP - A stationary police car emits a sound of frequency 1200 Hz...

physics - You are arguing over a cell phone while trailing an unmarked police ...

Calculus - The police department must determine a safe speed limit on a bridge ...

mitx 8.01x Classical Mechanics - A motorist traveling with constant speed of vc...

physics - A motorist traveling with constant speed of vc = 16.0 m/s passes a ...

physics - A roller coaster car speeds down a hill past point A and then rolls up...

Physics help! - Suppose that a police car on the highway is moving to the right ...

physics - Suppose that a police car on the highway is moving to the right at 26...