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STD added to numericQuestionAnalysis #314

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STD added to numericQuestionAnalysis #314

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489e704
STD added to numericQuestionAnalysis
anna-harrington-7 Apr 8, 2025
1c67ae6
Fixed STD (maybe)
anna-harrington-7 Apr 22, 2025
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20 changes: 19 additions & 1 deletion apps/form-builder/src/components/FormSubmissions/NumericQuestionAnalytics/index.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -16,12 +16,15 @@ export default function NumericQuestionAnalytics({
question,
responses,
}: Props) {
const { mean, median, mode } = useMemo(() => {
const { mean, median, mode, standardDeviation } = useMemo(() => {
let mean: number;
let median: number;
let standardDeviation: number;
let mode: number[] = [];
const numbers: number[] = [];
let total = 0;
let sdTotal = 0;
let stdMean: number;
const occurrences: number[] = [];
let maxOccur = 2;

Expand All @@ -35,6 +38,11 @@ export default function NumericQuestionAnalytics({
const number = questionResponse.answer;
total += number;
numbers.push(number);

@jmcheek jmcheek Apr 25, 2025

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keep this :)


// calculate mean for std
stdMean = ((total / numbers.length) * 100) / 100;
sdTotal += Math.pow(number - stdMean, 2);

@jmcheek jmcheek Apr 25, 2025

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remove line 43, and move line 44 into a separate loop

if (!occurrences[number]) occurrences[number] = 0;
occurrences[number]++;
}
Expand Down Expand Up @@ -68,10 +76,17 @@ export default function NumericQuestionAnalytics({
}
});

// calculate standard deviation
standardDeviation = Math.sqrt(sdTotal / numbers.length);

// Rounds standard deviation to hundredths place
standardDeviation = Math.round(standardDeviation * 100) / 100;

@jmcheek jmcheek Apr 25, 2025 •
edited
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You'll want to calculate the mean here, your line 43 should work I believe ->
const mean = total / numbers.length
You then want to loop through and calculate the variance, and then the standard deviation
so, use your line 44 here
for (const num of numbers){
sdTotal += Math.pow(number - stdMean, 2)
}
then leave line 83 just as you have it outside the loop, and your done!

return {
mean,
mode,
median,
standardDeviation,
};
}, [responses]);

Expand All @@ -88,6 +103,9 @@ export default function NumericQuestionAnalytics({
Mode: {mode.length ? mode.join(', ') : 'None'}
</ListItemText>
</ListItem>
<ListItem>
<ListItemText>Standard Deviation: {standardDeviation}</ListItemText>
</ListItem>
</List>
);
}