Question

accuracy and precision:
for each of the following, label the accuracy and precision of the temperature sensor
measurements as either high or low.

example #1.
suppose a lab refrigerator holds a constant
temperature of 38.0 °f (3.33°c). a
thermometer is tested 5 times in the
refrigerator. the temperatures from the test
yield are given in the table.

accuracy _____
precision_____

table: temperatures from thermometer, (°f and °c) with rows: 39.4°f, 4.11°c; 48.2°f, 9.00°c; 28.1°f, -2.17°c; 46.3°f, 7.94°c; 34.5°f, 1.39°c

example #2.
suppose a lab refrigerator holds a constant
temperature of 38.0 °f (3.33°c). a
thermometer is tested 5 times in the
refrigerator. the temperatures from the test
yield are given in the table.

accuracy _____
precision_____

table: temperatures from thermometer, (°f and °c) with rows: 37.8°f, 3.22°c; 38.3°f, 3.50°c; 38.1°f, 3.39°c; 37.4°f, 3.00°c; 38.0°f, 3.33°c

example #3.
suppose a lab refrigerator holds a constant
temperature of 38.0 °f (3.33°c). a
thermometer is tested 5 times in the
refrigerator. the temperatures from the test
yield are given in the table.

accuracy _____
precision_____

table: temperatures from thermometer, (°f and °c) with rows: 49.6°f, 9.78°c; 49.5°f, 9.72°c; 49.7°f, 9.83°c; 49.9°f, 9.94°c; 49.9°f, 9.94°c

Explanation:

Example #1

Step1: Analyze Accuracy

Accuracy refers to how close measurements are to the true value (38.0°F or 3.33°C). The measured values (39.4°F, 48.2°F, 28.1°F, 46.3°F, 34.5°F) are far from 38.0°F, so accuracy is low.

Step2: Analyze Precision

Precision refers to how close measurements are to each other. The measured values vary widely (e.g., 28.1°F to 48.2°F), so precision is low.

Step1: Analyze Accuracy

The measured values (37.8°F, 38.3°F, 38.1°F, 37.4°F, 38.0°F) are close to the true value (38.0°F), so accuracy is high.

Step2: Analyze Precision

The measured values are close to each other (e.g., 37.4°F to 38.3°F), so precision is high.

Step1: Analyze Accuracy

The measured values (49.6°F, 49.5°F, 49.7°F, 49.9°F, 49.9°F) are far from the true value (38.0°F), so accuracy is low.

Step2: Analyze Precision

The measured values are close to each other (e.g., 49.5°F to 49.9°F), so precision is high.

Answer:

Accuracy: low; Precision: low

Example #2