The batteries produced in a manufacturing plant have a mean time to failure of 30 months, with a standard deviation of 2 months.

Question

3 years ago

14

The batteries produced in a manufacturing plant have a mean time to failure of 30 months, with a standard deviation of 2 months.

I select a simple random sample of 400 batteries produced in the manufacturing plant. I test each and record how long it takes for each battery to fail. I then compute that the average failure time of the 400 batteries is 29.9 months with a standard deviation of 2.15 months. In this scenario, the value 30 is:

Mathematics

1 answer:

Oduvanchick [21] · Answer 1 · 2021-12-14T23:49:55+03:00

Oduvanchick [21]3 years ago

8 0

Answer:

The population mean.

Step-by-step explanation:

29.9 is the <u>sample</u> mean.