Sample Format Of Report Writing

sample format of report writing"sample format of report writing"
Java Program asking for statistics?

I have to write a java program that asks the user to
# prompt for a file name
# read a set of doubles from the file
# calculate and report n, the mean, and the population standard deviation. Format the mean and standard deviation to two decimal places.
*

Results for Numbers.txt from the sample programs

The sum of the 5 numbers in Numbers.txt is 41.40

average is 8.28

standard deviation 3.09



* Basic outline for the program
// prompt for input file
//while (data remains) {
// input number
// increment n
// accumulate sum of number
// accumulate sumsquares: sum of number^2
// }
// calculate and display n, mean, standard deviation

To calculate the standard deviation use:
sqrt{N sum x^2 -(sum x)^2 over N ^2}

Note: use Math.sqrt() to calculate the square root.
ill be needing to use:
JOptionPane.showInputDialog

How is the file going to be formatted?

String input = JOptionPane.showInputDialog("Enter file name:");
BufferedReader br = new BufferedReader(new FileReader(input));

//this section will differ based on file format
double n = 0;
double sum = 0;
String line = br.readLine();
while(br != null){
//Parse the line of text to get the integers. (also depends on file
//format) If there are multiple integers on a line you'll probably
//want to use an inner loop.
n++;
sum += (the integer)
line = br.readLine();
}

System.out.println("The sum of " + n + " Integers is "+sum);
System.out.println("The Average is "+sum/n);
...

P.S. You should really do your own homework if you want to learn anything.

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sample format of report writing
sample format of report writing
sample format of report writing