ACT PREP - Inaccuracy vs Precision

The video tutorial discusses a scientist's temperature measurements of a lake over five days. The digital thermometer used was found to be off by 0.7 degrees, leading to a discussion on whether the data is unreliable, imprecise, or inaccurate. The conclusion is that the data is inaccurate due to the consistent error, despite being reliable and precise in terms of repeatability. The tutorial emphasizes the importance of understanding the difference between reliability, precision, and accuracy in scientific measurements.

What was the consistent error found in the thermometer used by the scientist?

• 1.5 degrees

• 0.7 degrees

• 1.0 degrees

• 0.5 degrees

Why is the data considered imprecise rather than unreliable?

• The thermometer consistently deviated by a fixed amount.

• The thermometer was used incorrectly.

• The thermometer was broken.

• The thermometer readings varied greatly each time.

What does it mean for data to be imprecise?

• The data is not accurate but consistent.

• The data is not collected at regular intervals.

• The data is completely random.

• The data is not consistent in its error.

What is the final conclusion about the data's accuracy?

• The data is accurate.

• The data is inconclusive.

• The data is inaccurate.

• The data is unreliable.

How is accuracy different from precision in the context of this data?

• Both accuracy and precision refer to correctness.

• Accuracy refers to consistency, while precision refers to correctness.

• Both accuracy and precision refer to consistency.

• Accuracy refers to correctness, while precision refers to consistency.