static public decimal score(int x, int[] nums)
{
decimal mean = Mean.findMean(nums);
decimal SD = StandardDeviation.findSD(nums);
return(Division.Quotient((x - mean), SD));
}
public static decimal findSampleCorrelation(int[] xArray, int[] yArray)
{
decimal xMean = Mean.findMean(xArray);
decimal yMean = Mean.findMean(yArray);
decimal xStandardDev = StandardDeviation.findSD(xArray);
decimal yStandardDev = StandardDeviation.findSD(yArray);
decimal stepOne = 0;
decimal result;
for (int i = 0; i < xArray.Length; i++)
{
stepOne += ((xArray[i] - xMean) * (yArray[i] - yMean));
}
decimal stepTwo = stepOne / (xStandardDev * yStandardDev);
result = (stepTwo / (xArray.Length - 1));
return(result);
}