Category: Science
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PSLE Science Reality Lab Vol No.126 | “The Reading Is Inside the Limit” — Does Measurement Uncertainty Still Matter?
A Primary 5/6 PSLE Science Reality Lab guide to pass/fail claims near a limit: separate the measured value, measurement uncertainty, specification and decision rule before deciding what the evidence supports.
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PSLE Science Reality Lab Vol No.125 | “95% Confidence Interval” — Does That Mean 95% of the Individual Results Must Fall Inside It?
A Primary 5/6 PSLE Science Reality Lab guide to confidence intervals: learn why a 95% confidence interval estimates an unknown population quantity rather than containing 95% of individual observations.
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PSLE Science Reality Lab Vol No.124 | “p = 0.04” — Does That Mean There Is a 96% Chance the Claim Is True?
A Primary 5/6 PSLE Science Reality Lab guide to p-values in scientific reports: learn why p = 0.04 is not a 96% probability that a claim is true, and what evidence questions should come next.
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PSLE Science Reality Lab Vol No.123 | “A 100-Year Flood Happened Last Year” — Are We Safe for the Next 99 Years?
A Primary 5/6 PSLE Science Reality Lab guide to recurrence intervals: learn why a “100-year flood” means an annual probability, not a once-per-century appointment or a 99-year safety guarantee.
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PSLE Science Reality Lab Vol No.122 | “30% Chance of Rain” — Does That Mean It Will Rain for 30% of the Day or Over 30% of the Area?
A Primary 5/6 PSLE Science Reality Lab guide to weather probabilities: learn what a 30% chance of rain does—and does not—say about time, area, intensity and certainty.
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PSLE Science Reality Lab Vol No.121 | “The Process Is In Control” — Does That Mean Every Product Meets the Specification?
A massive Primary 5/6 PSLE Science Reality Lab guide to quality-control charts: learn why a stable process can still make unacceptable products and why specification limits are not the same as control limits.
