A researcher measures the diameter of a circular silicon wafer using a digital micrometer. The micrometer gives readings to the nearest 0.01 mm.
The researcher measures the diameter of the wafer eight times. Her readings are:
Identify the anomalous reading.
Calculate the average diameter of the wafer.
The researcher wants to find the thickness of a single wafer. She takes twelve similar silicon wafers, stacks them together, measures their total thickness using the micrometer, and divides this value by 12. State whether you agree with this method and explain why.
The researcher wants to find the density of the silicon. She uses her values for the average diameter and thickness of the wafer to calculate its volume. Describe what else she must do to obtain a value for the density of the silicon.