我已经构建了这个相当简单的程序，用于我的荣誉论文(心理学)，它基本上模拟了人们认为人类做出决策的一种方式。我有实际的人类数据，我将其与从该程序获得的结果进行比较，以确定该模型是否准确。我的编程经验相当有限，但我需要能够收集变量 rtCorrect 和 rtIn Correct 的标准差。我猜这将涉及将数字放入数组中。
我知道你们喜欢引导人们找到正确的答案，而不是直接给他们答案，这很好，但请记住，这不是编程作业，我不打算成为一名程序员，而且我有一篇重要论文要交本星期!如果有人能给我一些关于这样做的非常具体的建议，那就太棒了，谢谢!
顺便说一句，你现在可以忽略注释掉的部分(除非你有办法让我在不花两个月的情况下运行它)!
编辑:我需要找到变量 RT Correct 和 RTin Correct 的方差/标准差(我需要找到每个变量的方差和标准差)。我认为我的程序当前没有保存这些数字，所以我猜我需要将这些数字放入一个数组中以便之后进行分析。
import java.util.Random;
public class Thesis4 {
public static void main (String [] args){
int totalRTIncorrect = 0;
int totalRTCorrect = 0;
int totalCorrect = 0;
int totalIncorrect = 0;
for (int j = 0; j < 10000;j++){
int correct = 0;
int incorrect = 0;
int incorrect2 = 0;
int incorrect3 =0;
int rtCorrect = 0;
int rtIncorrect = 0;
int time = 0;
while(correct<88 && incorrect<88){
Random rand = new Random();
int pickedNumber = rand.nextInt(400);
if (pickedNumber<108){
correct++;
//incorrect--;
//incorrect2--;
//incorrect3--;
time++;
}
else if (pickedNumber>107 && pickedNumber<208){
incorrect++;
// correct--;
// incorrect2--;
// incorrect3--;
time++;
}
else if (pickedNumber>207&&pickedNumber<309){
incorrect2++;
// correct--;
// incorrect--;
// incorrect3--;
time++;
}
else if (pickedNumber>308){
incorrect3++;
// correct--;
// incorrect--;
// incorrect2--;
time++;
}
}
if (correct == 88){
rtCorrect = time;
totalCorrect++;
}
else if (incorrect == 88){
rtIncorrect = time;
totalIncorrect++;
}
else if (incorrect2 == 88){
rtIncorrect = time;
totalIncorrect++;
}
else if (incorrect3 == 88){
rtIncorrect=time;
totalIncorrect++;
}
totalRTIncorrect = totalRTIncorrect + rtIncorrect;
totalRTCorrect = totalRTCorrect + rtCorrect;
}
System.out.printf ("Total Correct Responses: %d \nTotal Incorrect Responses: %d", totalCorrect, totalIncorrect);
System.out.printf ("\nTotal Correct RT's: %d \nTotal Incorrect RT's: %d\n", totalRTCorrect, totalRTIncorrect);
}
}
最佳答案
如果要计算“totalCorrect”、“totalRTCorrect”和“totalRTIn Correct”这三个变量之间的标准差，最简单的方法是分四步完成:
第一步:求三个变量的平均值，即
Mean= (totalCorrect+totalRTCorrect+totalRTIncorrect)/3.0第 2 步:计算值:
a=(totalCorrect-Mean)*(totalCorrect-Mean) b=(totalRTCorrect-Mean)*(totalRTCorrect-Mean) c=(totalRTIncorrect-Mean)*(totalRTIncorrect-Mean)第三步:计算 a、b 和 c 的平均值
mean2= (a+b+c)/3.第四步:取mean2的平方根。
std=sqrt(mean2)
这就是三个变量的标准差。 因此，新版本的代码应如下所示:
import java.util.Random;
import java.lang.Math;
public class Thesis4 {
public static void main (String [] args){
int totalRTIncorrect = 0;
int totalRTCorrect = 0;
int totalCorrect = 0;
int totalIncorrect = 0;
for (int j = 0; j < 10000;j++){
int correct = 0;
int incorrect = 0;
int incorrect2 = 0;
int incorrect3 =0;
int rtCorrect = 0;
int rtIncorrect = 0;
int time = 0;
while(correct<88 && incorrect<88){
Random rand = new Random();
int pickedNumber = rand.nextInt(400);
if (pickedNumber<108){
correct++;
//incorrect--;
//incorrect2--;
//incorrect3--;
time++;
}
else if (pickedNumber>107 && pickedNumber<208){
incorrect++;
// correct--;
// incorrect2--;
// incorrect3--;
time++;
}
else if (pickedNumber>207&&pickedNumber<309){
incorrect2++;
// correct--;
// incorrect--;
// incorrect3--;
time++;
}
else if (pickedNumber>308){
incorrect3++;
// correct--;
// incorrect--;
// incorrect2--;
time++;
}
}
if (correct == 88){
rtCorrect = time;
totalCorrect++;
}
else if (incorrect == 88){
rtIncorrect = time;
totalIncorrect++;
}
else if (incorrect2 == 88){
rtIncorrect = time;
totalIncorrect++;
}
else if (incorrect3 == 88){
rtIncorrect=time;
totalIncorrect++;
}
totalRTIncorrect = totalRTIncorrect + rtIncorrect;
totalRTCorrect = totalRTCorrect + rtCorrect;
}
System.out.printf ("Total Correct Responses: %d \nTotal Incorrect Responses: %d", totalCorrect, totalIncorrect);
System.out.printf ("\nTotal Correct RT's: %d \nTotal Incorrect RT's: %d\n", totalRTCorrect, totalRTIncorrect);
//computation of the standard deviation of the three variables
double meanValue=(totalCorrect+totalRTCorrect+totalRTIncorrect)/3.0; //step1
double a= (totalCorrect-meanValue)*(totalCorrect-meanValue); //step2
double b= (totalRTCorrect-meanValue)*(totalRTCorrect-meanValue);
double c= (totalRTIncorrect-meanValue)*(totalRTIncorrect-meanValue);
double mean2=(a+b+c)/3.0; //step3
double standard_deviation=Math.sqrt(mean2); //step4
System.out.printf ("\nThe standard deviation of the three variables is %f\n",standard_deviation);
}
}
关于java - 如何从我生成的数据中获取标准差，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20387989/