Measurement and Data Analysis Quiz

John gets on a bathroom scale several times in a row the morning before an appointment with his doctor. The weight in kilograms (kg) readings are 72.6 kg, 72.5 kg, 72.7 kg, 72.6 kg, 72.6 kg. His weight is 77.1 kg when the nurse measures it 30 minutes later with a professional, calibrated scale. The weights from the bathroom scale represent

• accuracy but not precision.

• precision but not accuracy.

• both accuracy and precision.

• neither accuracy nor precision.

Emma and Liam are conducting an experiment in their science class. They need to ensure that their measurements are precise. Precision in measurement

• is never accurate.

• is the same as accuracy.

• results in reproducible measurements.

• all of the above

• none of the above

Emma and Liam are conducting a science experiment. What must they do to ensure their experiment provides meaningful data?

• Collect accurate, precise, and unbiased data

• Perform multiple trials

• Consider reasonability of data

• Draw conclusions that support or reject hypothesis

• All of the above

Olivia and Noah are analyzing their experiment results. What should they do to ensure their conclusions are valid?

• Verify the consistency of their data

• Compare their results with existing literature

• Ensure their data is reproducible

• All of the above

Emma and Liam are measuring the temperature of a solution. To ensure accuracy, they should

• use a calibrated thermometer

• take multiple readings

• record the temperature at the same time each day

• all of the above

Emma and Liam are conducting a survey. To avoid bias in their data, they should

• randomly select participants

• ask leading questions

• only survey their friends

• none of the above