在php中使用加权平均值进行分级

Cybervanes 发表于 Dev

赛博风向标

我如何用php对该测试进行评分？我需要一个分数...

我有一系列问题，其中包含正确/错误的布尔值和相应的权重。

我需要首先找到正确答案的平均值吗？

等式是什么？

$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'];
    }
}

乍得·费舍尔

您可以计算候选人获得的权重数量（即您拥有的积分），然后计算可能的总权重（即满分）。

然后，您可以将候选分数除以总分数：

分数=候选人分数/总分数

从那里您可以计算百分比：

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;