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
What is mean & Standard deviation? 10 points Hard Math Help?
1.) http://tinypic.com/r/91cnxx/6
2.) Calculate the mean and standard deviation, to the nearest hundredth, for the following binomial experiment.
A regular 6-sided die is rolled 50 times and the number of times an even number appears is recorded.
Mean =
Standard Deviation=
3.) A manufacturer of computer chips has found that about 0.5% of the chips it produces are defective. Calculate the mean and standard deviation for the number of defective chips in a sample of 1000.
Enter your answers, to the nearest hundredth, in the answer boxes below.
Mean =
Standard Deviation =
1 Answer
- Damon LyonLv 79 years agoFavorite Answer
The mean is the average
Standard deviation is a little harder to describe. Its the square root of - [ the sum of (each piece of data minus the mean)² all divided by the number of elements minus one].
LoL
In the first question on tinypic, you get the mean by multiplying each of the numbers by its frequency, adding them all together, and dividing it by the total frequency, which is 50.
it comes out 26.56
To get the standard deviation, subtract 26.56 from each of the numbers starting with 25 and square the result. You get:
-1.56² = 2.4336
-0.56² = 0.3136
1.44² = 2.0736
2.44² = 5.9536
3.44² = 11.8336
4.44² = 19.7136
Now take those squared differences, add them together, and divide by (n - 1), which would be 5.
42.3216 / 5 = 8.46432
Last, you take the square root of 8.46532, which is 2.90935.
So you have a standard deviation of approximately 2.9
