Nutrients by the Numbers

18 Jan 2024 · 42 min
41:58

Gaye Wilson, a registered dietitian at Wolfram Research, uses statistical tests on USDA food data to compare nutrients across groups. Zinc and folate differ significantly between foods (p<0.05), saturated and monounsaturated fats correlate strongly (r≈0.9), and sugar and fiber in cereals move in opposite directions (r≈−0.4).

Questions this video answers

259 branded/USDA strawberry records.

About 232 branded/USDA breakfast cereal records.

Approximately 0.04 (p ≈ 0.04), reported as < 0.05 → reject null.

P-value below 0.05 → reject the null hypothesis (significant difference in folate).

Mann–Whitney U test; reported p ≈ 0.00066 (stated as 0.066%) and short conclusion 'do not reject' (fail to reject the null — no significant difference).

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