A Wooden Log Floats in a River (Density 1000 Kg/m³)

question 21

Multiple Choice

A wooden log floats in a river (density 1000 kg/m³) , with one-quarter above the water, carried toward the sea (density 1025 kg/m³) by the river current. What will be the change in the percentage of the volume of log above water when it comes to the sea?

• A)The log will go up 2%.
• B)The log will go down 2%.
• C)The log will go up 27%.
• D)The log will go down 27%.

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Definitions:

Confidence Interval

A set of values generated from the study of a sample, anticipated to include the parameter of an unobserved population.

Mean

The average of a set of numbers, calculated by adding them together and dividing by the count of numbers.

Population Standard Error

A measure of the variability or dispersion of a population parameter, estimating the standard deviation of those parameters.

Confidence Interval

A spectrum of values, stemming from the statistics of samples, that is probable to contain the value of an elusive population parameter.