ideal (daytime) noise-level for hospitals is 45 decibels with a standard deviation of 9 db; which is to say, this may not be true. A simple random sample of 80 hospitals at a moment during the day gives a mean noise level of 47 db. Assume that the standard deviation of noise level for all hospitals is really 9 db. All answers to two places after the decimal. 1) We can be 90% confident that the actual mean noise level in hospitals is_______db with a margin of error of______. (e) Assuming our sample of hospitals is among the most typical half of such samples, the actual mean noise level in hospitals is between______db and_______db. We
The ideal (daytime) noise-level for hospitals is 45 decibels with a standard deviation of 9 db; which is to say, this may not be true. A simple random sample of 80 hospitals at a moment during the day gives a
1) We can be 90% confident that the actual mean noise level in hospitals is_______db with a margin of error of______.
(e) Assuming our sample of hospitals is among the most typical half of such samples, the actual mean noise level in hospitals is between______db and_______db. We are 95% confident that the actual mean noise level in hospitals is________db, with a margin of error of______.
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