Standard Error: For What Is it Used?
820314
Standard error is standard deviation divided by n^1/2. In other words, it estimates the standard deviation of the sample mean _based on the population mean_.
961030
in Statistics in theory there should zero measurements falling beyond the three standard deviations from the mean on either side. though in practical some values do fall in this range. I don't remember the exact statistical names of these values but i think they are referred to as "outliers".
659445
well first, you need the actual value, then use the %error formula\n\n(actual-experimental) / actual X 100% = (just change the sign if it is negative)\n\nyou should probably use the averages of the 2 methods you used, but without the actual value, i can't get you the answer
750228
my guess would be an error message.
1047890
class C\n{\npublic:\nenum { NUM_VALUES = 10 };\n\nprivate:\ndouble m_values[NUM_VALUES];\n\npublic:\n// Sets the number stored at index i in m_values to v\nvoid SetValue(int i, double v) throw( std::exception )\n{\nif ( i < 0 || i >= NUM_VALUES ) throw std::exception("Index out of range");\nm_values[i] = v;\n}\n\n// Gets the number stored at index i in m_values\ndouble GetValue(int i) const throw( std::exception )\n{\nif ( i < 0 || i >= NUM_VALUES ) throw std::exception("Index out of range");\nreturn m_values[i];\n}\n\n    // Returns the mean of the numbers stored in m_values\n    double GetMean(void) const \n    {\n        double sum = 0;\n        for ( int i = 0; i < NUM_VALUES; i ++ ) sum += m_values[i];\n        return sum / NUM_VALUES;\n    }\n\n    // Returns the sample standard deviation of the numbers stored in m_values\n    double GetStandardDeviation(void) const \n    {\n        double mean = GetMean();\n        double sum = 0;\n        for ( int i = 0; i < NUM_VALUES; i ++ ) sum += (m_values[i]-mean)*(m_values[i]-mean);\n        return sqrt(sum/(NUM_VALUES-1));\n    }\n};
71395
Collective inertia towards innovation. What is a widely used mistake today is the standard tomorrow. Try to worry more about the quality of the writing than the attention to grammatical "rules."
663573
It's doubtful there is a standard. They come in a variety of sizes, shapes and materials. See, for instance, the ref. below.
10650
Just compile it and see what the errors are. Sheesh!
1120383
Fine.\n\nYou need the find the average and SD of the box.\n\nAverage = (0+0+1)/3 = 1/3\nSD = (1-0)sqrt{(1/3)(2/3)} = 0.471\n(using the shortcut SD = (big-small)*sqrt(frac of big * frac of small))\n\nThe expected number of 1's is the number of draws times average of the box, so 600(1/3) = 200.\n\nHowever, we would expect to be off of the expected by a standard error or so.  The standard error of the number of 1's is \nsqrt(number of draws)*sd of the box, so sqrt(600)*0.471 = 11.55.
345229
Multiple regression is often used to test a model with a few free parameters. There exist several methods to find the optimal values. \n\nTrial and error *is* one of these methods but not a very efficient one. It is often used as starting method to get an idea of *where* in the parameter space the optimal solutions are located.
1156399
This is a good question even for a statistician.\nThe problem is your set is small and I do not know what the deviation between samples is, however the repeatability and reproducibility information can bind the window \nthrough which the third value will fall through or perhaps even remain in.  \n\nLet me know.
292966
Standard deviation is often called standard error.  Say you take a sample of 100 people to know their averga ages.  You calculate the standard deviation by first knowing what the average is.  Let´s say the average age is 35 years old.  By definition, the standard deviation would be how many years are the people on your sample older or younger than the average. It could be about 3 years.  That means that most people in your sample has ages between 32 (35-3) and 38 (35+3) years.\nby now you should have the formula, and some example.  Notice that if you draw a graph made by columns with your data, the standard deviation measures exactly a proportion of the width of a column in your graph.
256283
in order to get a correct answer, what exactly does the error message say???
806688
The first error is :  Can you find the error? \nFIND THE PROBLEM\nFind <what's> wrong here... (you left out the ' in whats)\n\nand the second error is: You used a "0" instead of an "O".
29423
Standard deviation tells you how spread out a set of numbers is.  A small standard deviation means that the numbers are close together.  A large one says that they're far apart.\n\nIt's often used as a measure of distance away from the mean.  In a normal distribution, about 68% of numbers are within one standard deviation from the mean.  For example, if you have a normal distribution with a mean of 50 and a standard dev of 10, then about 68% of the numbers are between 40 and 60.  And about 95% of the numbers are within two standard deviations, or between 30 and 70.
466776
Statistics studies, among other things, deviations from normals and can help to explain errors (as well as help explain how errors are propagated and where their sources can be).\n\nFor example, if you have a numerical amount with an error and you multiply that value by something known and constant (like conversion from USD to Euros, for example), that error will be multiplied by that conversion rate.\n\nStatistics uses error calculation such as standard deviation (how much a value can vary from the average amount) and goes very far into detail about sums of errors etc. and how they affect averages, errors, and final values.\n\nAdditinoally, there are some formulae that are used all throughout the sciences that can be applied to accounting, and those sciences use statistics, again, to calculate errors.  For example, growth and decay of a radioactive substance has a certain formula that uses exponential (e to the power of something), but this is also used to calculate economic growth rates and can be applied to the stock market (it can also be used to explain traffic jams and other civil engineering problems).
253055
Off the top of my head, don't hate me if there are errors...\n\nclass MyVar\n{\npublic:\n  int a;\n  MyVar ( MyVar& src )\n  { a = src.a; }\n}\n\n...\nMyVar p;\np.a = 5;\nMyVar q(p);\n// q.a==5 is true