在php中使用加权平均值进行分级

我如何用php给这个测试打分？我需要一个百分比分数

我有一系列问题，包括正确/不正确的bool和相应的权重

我需要先找到正确答案的平均值吗

方程式是什么

$questions = array(
    0=>array(
        'Question'=>"Some Question",
        'Correct'=>true,
        'Weight'=>5,
    ),
    1=>array(
        'Question'=>"Some Question",
        'Correct'=>false,
        'Weight'=>5,
    ),
    2=>array(
        'Question'=>"Some Question",
        'Correct'=>true,
        'Weight'=>4,
    ),
    3=>array(
        'Question'=>"Some Question",
        'Correct'=>true,
        'Weight'=>0,
    ),
    4=>array(
        'Question'=>"Some Question",
        'Correct'=>false,
        'Weight'=>5,
    ),
    5=>array(
        'Question'=>"Some Question",
        'Correct'=>true,
        'Weight'=>4,
    ),
);
$weights = array(
    0=>0
    1=>0
    2=>.05
    3=>.20
    4=>.25
    5=>.50
);
$totalQuestions=0;
$correctAnswers=0;
$points=0;
foreach($questions as $question){
    $totalQuestions++;
    if($question['Correct']){
        $correctAnswers++;
        $points = $points = $weights[$question['Weight'];
    }
}

通常，平均值（加权或非加权）是所有可能的事物的总和。若它是加权的，那个通常意味着每件事物不是一件事物，但实际上是事物的权重

例如：

$totalQuestions = count($questions); //No need to increment
$totalWeight = 0; //Could do a sum here but no need
$weightedSum = 0;
foreach($questions as $question){
    $totalWeight += isset($question["Weight"])?$question["Weight"]:0; //Assume a question with no weight has 0 weight, i.e., doesn't count. Adjust accordingly
    if($question['Correct']){
        $weightedSum += isset($question["Weight"])?$question["Weight"]:0;
    }
}
$weightedAverage = $weightedSum / $totalWeight;

通常，平均值（加权或非加权）是所有可能的事物的总和。若它是加权的，那个通常意味着每件事物不是一件事物，但实际上是事物的权重

例如：

$totalQuestions = count($questions); //No need to increment
$totalWeight = 0; //Could do a sum here but no need
$weightedSum = 0;
foreach($questions as $question){
    $totalWeight += isset($question["Weight"])?$question["Weight"]:0; //Assume a question with no weight has 0 weight, i.e., doesn't count. Adjust accordingly
    if($question['Correct']){
        $weightedSum += isset($question["Weight"])?$question["Weight"]:0;
    }
}
$weightedAverage = $weightedSum / $totalWeight;

---

您可以计算候选人获得的权重（即您的分数），然后计算可能的总权重（即满分）

然后，您可以将候选人得分除以总分：

得分=候选人得分/总分

从中可以计算百分比：

百分比=分数*100

使用您的代码：

$totalQuestions=0;
$totalWeights=0;
$correctAnswers=0;
$weightsEarned=0;
foreach($questions as $question){
    $totalQuestions++;
    $totalWeights+=$weights[$question['Weight']];
    if($question['Correct']){
        $correctAnswers++;
        $weightsEarned += $weights[$question['Weight']];
    }
}

echo "Score Overview: ";
echo "<br/>Weights Earned: " . $weightsEarned;
echo "<br/>Correct Answers: " . $correctAnswers;
echo "<br/>Total Weights Possible : " . $totalWeights;
echo "<br/>Percentage Earned: " . ($weightsEarned / $totalWeights) * 100;

$totalQuestions=0；
$totalWeights=0；
$correctAnswers=0；
$weightsEarned=0；
foreach（$问题作为$问题）{
$totalQuestions++；
$totalWeights+=$weights[$question['Weight']]；
如果（$问题['Correct']））{
$correctAnswers++；
$weightsarned+=$weights[$question['Weight']]；
}
}
回声“分数概述：”；
echo“
赢得的权重：”$重量变重；
回声“
正确答案：”$正确答案；
echo“
可能的总重量：”$总重量；
echo“
获得的百分比：”。（$weightserned/$totalWeights）*100；

您可以计算候选人获得的权重（即您的分数），然后计算可能的总权重（即满分）

然后，您可以将候选人得分除以总分：

得分=候选人得分/总分

从中可以计算百分比：

百分比=分数*100

使用您的代码：

$totalQuestions=0;
$totalWeights=0;
$correctAnswers=0;
$weightsEarned=0;
foreach($questions as $question){
    $totalQuestions++;
    $totalWeights+=$weights[$question['Weight']];
    if($question['Correct']){
        $correctAnswers++;
        $weightsEarned += $weights[$question['Weight']];
    }
}

echo "Score Overview: ";
echo "<br/>Weights Earned: " . $weightsEarned;
echo "<br/>Correct Answers: " . $correctAnswers;
echo "<br/>Total Weights Possible : " . $totalWeights;
echo "<br/>Percentage Earned: " . ($weightsEarned / $totalWeights) * 100;

$totalQuestions=0；
$totalWeights=0；
$correctAnswers=0；
$weightsEarned=0；
foreach（$问题作为$问题）{
$totalQuestions++；
$totalWeights+=$weights[$question['Weight']]；
如果（$问题['Correct']））{
$correctAnswers++；
$weightsarned+=$weights[$question['Weight']]；
}
}
回声“分数概述：”；
echo“
赢得的权重：”$重量变重；
回声“
正确答案：”$正确答案；
echo“
可能的总重量：”$总重量；
echo“
获得的百分比：”。（$weightserned/$totalWeights）*100；

可以优化，但以下是完整的等式：

$weights = array(
    0=>0,
    1=>0,
    2=>.05,
    3=>.20,
    4=>.25,
    5=>.50,
);

$byWeight = array();
foreach($questions as $question){
    //$totalQuestions++;
    $byWeight[$question['Weight']]['TotalNumberOfQuestionsForWeight']++;
    if($question['Correct']){
        $byWeight[$question['Weight']]['CorrectAnswers']++;
    }
}

$totalWeightsSum = 0;
foreach($byWeight as $weight => $data){
     $totalWeightsSum = $totalWeightsSum + (($data['CorrectAnswers'] / $data['TotalNumberOfQuestionsForWeight']) * $weights[$weight]);
}

echo '<pre>'.var_export($byWeight,1).'</pre>';
echo $totalWeightsSum / array_sum($weights);

$weights=数组(
0=>0,
1=>0,
2=>.05,
3=>.20,
4=>.25,
5=>.50,
);
$byWeight=array（）；
foreach（$问题作为$问题）{
//$totalQuestions++；
$byWeight[$question['Weight']['TotalNumberOfQuestionsForWeight']++；
如果（$问题['Correct']））{
$byWeight[$question['Weight']['CorrectAnswers']++；
}
}
$totalWeightsSum=0；
foreach（$weight作为$weight=>$data按重量计算）{
$TotalWeightsum=$TotalWeightsum+（$data['CorrectAnswers']/$data['TotalNumberOfQuestionsOverweight']）*$weights[$weight]）；
}
echo.''var_导出（$按重量，1）。''；
echo$totalweightsum/array\u和（$weights）；

可以优化，但以下是完整的等式：

$weights = array(
    0=>0,
    1=>0,
    2=>.05,
    3=>.20,
    4=>.25,
    5=>.50,
);

$byWeight = array();
foreach($questions as $question){
    //$totalQuestions++;
    $byWeight[$question['Weight']]['TotalNumberOfQuestionsForWeight']++;
    if($question['Correct']){
        $byWeight[$question['Weight']]['CorrectAnswers']++;
    }
}

$totalWeightsSum = 0;
foreach($byWeight as $weight => $data){
     $totalWeightsSum = $totalWeightsSum + (($data['CorrectAnswers'] / $data['TotalNumberOfQuestionsForWeight']) * $weights[$weight]);
}

echo '<pre>'.var_export($byWeight,1).'</pre>';
echo $totalWeightsSum / array_sum($weights);

$weights=数组(
0=>0,
1=>0,
2=>.05,
3=>.20,
4=>.25,
5=>.50,
);
$byWeight=array（）；
foreach（$问题作为$问题）{
//$totalQuestions++；
$byWeight[$question['Weight']['TotalNumberOfQuestionsForWeight']++；
如果（$问题['Correct']））{
$byWeight[$question['Weight']['CorrectAnswers']++；
}
}
$totalWeightsSum=0；
foreach（$weight作为$weight=>$data按重量计算）{
$TotalWeightsum=$TotalWeightsum+（$data['CorrectAnswers']/$data['TotalNumberOfQuestionsOverweight']）*$weights[$weight]）；
}
echo.''var_导出（$按重量，1）。''；
echo$totalweightsum/array\u和（$weights）；