business statistics
posted by Josephine .
Please can you give me the step to do this exercise? Thank you
Samples of 12volt batteries are taken at 30minute intervals during a production run. Each sample consists of 3 batteries, and a technician records how long each battery will produce 400 amperes during a standard test. Given the following data, also listed in file XR20042, construct 3sigma mean and range control charts and evaluate whether the process is in control.
Minutes Sample Battery1 Battery2 Battery3
13.3 1 13.3 9.4 12.1
9.4 2 12.2 13.4 8.5
12.1 3 11.2 8.2 9.2
12.2 4 7.8 9.7 10.0
13.4 5 10.1 11.4 13.8
8.5 6 9.9 11.7 8.5
11.2
8.2
9.2
7.8
9.7
10.0
10.1
11.4
13.8
9.9
11.7
8.5

The "following data" does not show up with your question.

Minutes Sample Battery Battery Battery
$ e 1 2 3
13.3 1 13.3 9.4 12.1
9.4 2 12.2 13.4 8.5 12.1 3 11.2 8.2 9.2
12.2 4 7.8 9.7 10.0
13.4 5 10.1 11.4 13.8
8.5 6 9.9 11.7 8.5
11.2
8.2
Thank you drwls (this is the second part of the exercise)
Respond to this Question
Similar Questions

Science
I did a science experiment on batteries. I ran five brands of AA Alkaline batteries until they would no longer run a small light bulb. I measured the voltage of each battery every hour. I did this experiment four times using the same … 
business statistics
Samples of 12volt batteries are taken at 30minute intervals during a production run. Each sample consists of three batteries, and a technician records how long each battery will produce 400 amperes during a standard test. Given the … 
Statistics
the manufacturer of a certain brand of auto batteries claims the mean life of these batteries is 45 months. A consumer protection agency that wants to check this claim took a random sample of 36 such batteries and found the mean life … 
Statistics
A battery manufacturer is positive that its AA batteries last for 1,000 hours. However, you’re working for Consumer Reports and you don’t agree with what they say about their product. So, you buy 400 batteries and you test them … 
math
Suppose that an automobile parts wholesaler claims that .5 percent of the car batteries in a shipment are defective. A random sample of 200 batteries is taken, and four are found to be defective. (a) Use the Poisson approximation to … 
Math
Suppose that an automobile parts wholesaler claims that .5 percent of the car batteries in a shipment are defective. A random sample of 200 batteries is taken, and four are found to be defective. (a) Use the Poisson approximation to … 
Statistics
Suppose that an automobile parts wholesaler claims that .5 percent of the car batteries in a shipment are defective. A random sample of 200 batteries is taken, and four are found to be defective. (a) Use the Poisson approximation to … 
statistics
The Acme Company has developed a new battery. The engineer in charge claims that the new battery will operate continuously for at leas 7 minutes longer than the old battery. To test the claim, the company selects a simple random sample … 
statistics
From a shipment of 350 batteries, a sample of 125 was selected at random and tested. If 25 batteries in the sample were found to be dead, how many dead batteries would be expected in the entire shipment? 
Sampling Distributions
A firm produces batteries that have a lifetime which is normally distributed with a mean of 360 minutes and a standard deviation of 30 minutes. The firm needs to keep an eye on the production process to ensure that everything is working …