Question

What are the two types of errors one encounters in experiments?  Give an example of each.  You may use examples from your chemistry, biology, or other physics courses.

What does standard deviation of measured data tell you?

What does the mean of a group of measured data tell you?

Answer 1

one error is impure samples. It is nearly impossible to get a 100% pure substance free of any outside factor. I could almost use any lab for this. Another error that occurs is using the exact amount it specifies such as you need 20.0g of Copper Sulfate. this can greatly very between 20.01, 20.02, ....20.0999999999. there is an infinite amount of numbers after that last zero. and that .01 grams could make a huge difference in the reaction.

Standard deviation is often seen in statistics. The graph of this will look like a bell. in the middle is the most common and as you approach the far left or right the probability shrinks.

The mean of graph is the same as the average. add up all the values and divide by the number of values.