We Use an Ultrasound Signal to Explore the Layer of Tissue

question 7

Multiple Choice

We use an ultrasound signal to explore the layer of tissue in which sound travels at a speed of 1450 m/s. If the echo arrives with a delay of 37 ìs, what is the thickness of that layer of the tissue?

• A)5.4 cm
• B)2.7 cm
• C)3.7 mm
• D)1.9 mm

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Definitions:

Variance

A measure of the dispersion or spread of a set of data points around their mean value, indicating how much the data points differ from the average.

Standard Deviation

A calculation that quantifies the extent of deviation or spread within a group of data points.

Sample Variance

A measure of how datapoints in a sample are spread out from their sample mean, quantifying the extent of variation within the sample.

Kurtosis

A measure of the "tailedness" of the probability distribution of a real-valued random variable; high kurtosis indicates a distribution with heavy tails and a sharp peak, while low kurtosis indicates a flatter distribution.