Expert answer:Programming project in Java programming

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Expert answer:The program needs to have a method to test the program. Every time I have tried I get an error message. This is the problem:Write a program that takes its input from a text file of strings representing numbers of type double. The program outputs to the screen the average and standard deviation of the numbers in the file. The file contains nothing but strings representing numbers of type double, one per line. The standard deviation of a list of numbers n1, n2, n3, and so forth is defined as the square root of the average of the following numbers: (n1 – a)2, (n2 – a)2, (n3 – a)2, and so forth. The number a is the average of the numbers n1, n2, n3, and so forth. Hint: Write your program so that it first reads the entire file and computes the average of all the numbers, then closes the file, and then reopens the file and computes the standard deviation. You will find it helpful to first do Programming Project 10.3 and then modify that program in order to obtain the program for this project.Problem 3 – Write a program that takes its input from a text file of strings representing numbers of type double and outputs the average of the numbers in the file to the screen. The file contains nothing but strings representing numbers of type double, one per line

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