The water department checks the city water supply on a regular basis for contaminants such as xylenes. the water department take

Question

3 years ago

11

The water department checks the city water supply on a regular basis for contaminants such as xylenes. the water department take

s 200 samples and estimates that the concentration of xylenes in your drinking water is 3.5 ppb (parts per billion), with a standard deviation of 0.2 ppb.
assuming the samples were random and unbiased, how much confidence can you have in this data?

Mathematics

1 answer:

Novosadov [1.4K] · Answer 1 · 2022-01-11T23:57:52+03:00

Novosadov [1.4K]3 years ago

6 0

Answer:

Its A

Step-by-step explanation: