Posted by **Anonymous** on Wednesday, October 3, 2007 at 9:37pm.

A company is considering implementing one of two quality control plans for monitoring the weights of automobile batteries that it manufactures. If the manifacturing process is working properly, the battery weights are approximatedly normally distributed with a specified mean and standard deviation.

Qaulity control plan A calls for rejecting a battery as defective if its weight falls more than 2 standard deviations below the specified mean.

Qaulity control plan B calls for rejecting a battery as defective if its weight falls more than 1.5 interquartile ranges below the lower quartile of the specified population.

a) What proportions of batteries will be rejected by plan A?

I got .025.

b) What is the probability that at least 1 of 2 randomly chosen batteries will be rejected by plan A?

I am completely drawing blank on this one.

c) What proportions of batteries will be rejected by plan B?

I don't know how to do this one either.

## Answer This Question

## Related Questions

- statistics - The numbers of hours of life of a torch battery is normally ...
- Math - An apothecary has a set of five weights for use in the pans of his ...
- Sampling Distributions - A firm produces batteries that have a lifetime which is...
- Data Analysis - A firm produces batteries that have a lifetime which is normally...
- Statistics - . A certain company makes 12-volt car batteries. After many years ...
- math - A fitness company surveyed the weights of its 90 costumers. Assume that ...
- math - A fitness company surveyed the weights of its 90 costumers. Assume that ...
- mgt 420 - Individual Assignment: Prepare a 350- to 700-word paper in which you ...
- Statistics - A battery manufacturer is positive that its AA batteries last for 1...
- Statistics - A certain company makes 12-volt car batteries. After many years of ...

More Related Questions