PWR-008 · checking page
Check your work: Read spread, outliers, and drift in three fictional force traces
Use this page only after every exercise response is locked. Return to the tutorial if you opened it too early.
Staged checking material
Answer key
- Formulas: mean = sum of eight values / 8; range = maximum value - minimum value; MAD = sum of |each value - mean| / 8
- Answers: Trace: A; Sum n: 400; Mean n: 50; Range n: 2; Mad n: 0.5; Pattern: Low spread around the target with no sustained time trend in these eight samples.; Trace: B; Sum n: 408; Mean n: 51; Range n: 8; Mad n: 1.75; Pattern: Seven values at 50 N and one isolated high value at second 8; describe the event rather than calling the whole trace a drift.; Trace: C; Sum n: 404; Mean n: 50.5; Range n: 7; Mad n: 2; Pattern: A gradual upward drift from 47 N to 54 N.
Scoring rule
Award 1 point per trace for the correct mean, range, MAD, and pattern: 12 points.; Award 1 point for confirming the configurations are comparable and 1 point for a non-diagnostic conclusion: 14 points total.; Do not award the pattern point when B is called drift or C is called one outlier.
Authority boundary: Titan teaches a complete Power-specific research method because operational capability practice is not currently justified.