Question

The manager of a warehouse would like to know how many errors are made when a product’s serial number is read by a bar-code reader. Six samples are collected of the number of scanning errors: 36, 14, 21, 39, 11, and 2 errors, per 1,000 scans each.

What number of errors is made by all scans, based on these six samples?

Answer 1

@Mehek14 @sleepyjess

Answer 2

You can add up all the errors found in each sample, that gives the total number of errors.

Answer 3

So in other words find the mean?

Answer 4

@Hero

Answer 5

@agent0smith

Answer 6

@supercalifragalisticexspeaalli Is there any way you could help me with this

Answer 7

Do you know how many scans there are total?

Answer 8

If not just add them up. You can then divide by 60 to find a percentage

Answer 9

exactly just find the mean or total errors found in each sample then divide

Answer 10

depends on what you need to know really

Answer 11

Hmm, "What number of errors is made by all scans"
seems to me asks for the total number, not the average.
@tootsi123 would you please double-check if there is not a missing word in the question?

Answer 12

It is word for word. I copy and pasted it on here.

Answer 13

Well, you need to know the total number of scans before you can find out how many total errors there are based on a sample.

Answer 14

How would I do that?

Answer 15

You can't, the data in the question is insufficient. You need to know the total number of scans to find the total number of errors from a sample. This question is like if I asked you how many spelling errors I have ever made on Openstudy based on just this one post.

Answer 16

"... Six samples are collected of the number of scanning errors: 36, 14, 21, 39, 11, and 2 errors, per 1,000 scans each.

What number of errors is made by all scans, based on these six samples?"
Since these are samples, and errors are per 1000.
Add up the six numbers (122 errors per 6000).
The best estimate we can do is to have (122/6000)*total number of serial numbers.