Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Someone please answer my STATISTICS question?? 10 points!?
Consider a sample of 3 observations, with a standard deviation of s =1. If the first 2 observations
are 100 and 101, what is the value of the third observation?
3 Answers
- Anonymous1 decade ago
Let the mean be m and the third result x.
By definition of the mean (100 + 101 + x)/3 = m
By definition of variance (100^2 + 101^2 + x^2]/3 - m^2 = 1
Solve those simultaneous equations. There are two possible answers which are NOT whole numbers. One is a little over 98.5 and the other is a little under 102.5
P.S. Work out the standard deviation of 99, 100, 101 and it comes to 0.82 (2 dec. pl.)
