I am interested in finding the mean and standard deviation of the whole distribution by looking only at a random sample. I don't know anything else about the distribution (for example I don't know if the distribution is normal or not). Is what I'm asking even possible? Best Answer Sure, your best guess of the … Read more
Both Root Mean Square and Average absolute deviation seem like the measures of the magnitude of variability (especially when the variates are both +ve and -ve). What are the rules of thumb to choose one of them over the other? Best Answer In theory, this should be determined by how important different sized errors are … Read more
I want to visualize the following data in the more concise way possible (only 1 figure of possible!) I have the following averaged and std (grey shaded) profiles, which come from 20 different experiments. I can generate different profiles for different values of N = {1,10,100,1000,…} (The first figure is an example for N=100, the … Read more
I want to visualize the following data in the more concise way possible (only 1 figure of possible!) I have the following averaged and std (grey shaded) profiles, which come from 20 different experiments. I can generate different profiles for different values of N = {1,10,100,1000,…} (The first figure is an example for N=100, the … Read more
I was given a question for an assignment but I don't understand whether or not I have the right answer… The question is this- What percentage of the students scored more than one standard deviation above the mean? I was given a data set of 50 scores of students in a statistics course and calculated … Read more
I was given a question for an assignment but I don't understand whether or not I have the right answer… The question is this- What percentage of the students scored more than one standard deviation above the mean? I was given a data set of 50 scores of students in a statistics course and calculated … Read more
Is there a way for standard deviation to ignore negative numbers? In other words, how can you make it so that 2 or 3 deviations do not extend into negative territory? When looking at a set of only positive numbers, within one or two standard deviations, I end up with negative numbers. It's essentially impossible … Read more
Is there a way for standard deviation to ignore negative numbers? In other words, how can you make it so that 2 or 3 deviations do not extend into negative territory? When looking at a set of only positive numbers, within one or two standard deviations, I end up with negative numbers. It's essentially impossible … Read more
Suppose that we have a set of points on a line. The amount of dispersion can be measured by standard deviation in this case. My question is, is there something similar for higher dimensions? For example, if there are 100 points ($i, j: 0 le i le 9, 0 le j le 9$), then we … Read more
Suppose that we have a set of points on a line. The amount of dispersion can be measured by standard deviation in this case. My question is, is there something similar for higher dimensions? For example, if there are 100 points ($i, j: 0 le i le 9, 0 le j le 9$), then we … Read more