NTS 2025: Standard errors
Updated 10 September 2026
Applies to England
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This publication is available at https://www.gov.uk/government/statistics/national-travel-survey-2025/nts-2025-standard-errors
Standard errors have been produced for 2025, following a method designed by the Office for National Statistics (ONS) for calculating standard errors for a weighted NTS sample
Standard errors, together with the 95% confidence intervals, provide an indication of the degree of uncertainty associated with estimates derived from sample data.
Standard errors are provided to help users of National Travel Survey data understand the levels of uncertainty within some of the most widely used NTS statistical estimates. More details on how they are calculated are available in the 2025 background quality report.