The Weight of a Product Is Measured in Pounds $\bar { X }$

question 140

Multiple Choice

The weight of a product is measured in pounds.A sample of 50 units is taken from a batch.The sample yielded $\bar { X }$
= 75 lbs. ,and we know that ?² = 100 lbs.Calculate a 95 percent confidence interval for ?.

• A) \([ 71.25\)\( \quad\)\( \quad\)\(78.75 ]\)
• B) \([ 72.23\)\( \quad\)\( \quad\)77.77]
• C) \(\left[ \begin{array} { l l }
• 47.28 & 102.72
• \end{array} \right]\)
• D) \(\left[ \begin{array} { l l }
• 72.67 & 77.33
• \end{array} \right]\)

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Definitions:

Normal Fault

A type of fault where the hanging wall moves downward relative to the footwall due to extensional forces, common in divergent plate boundaries.

Fault Scarp

A steep slope or cliff formed directly by movement along a fault line, indicative of tectonic activity.

Earthquake

The shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves.

Volcanic Explosions

Violent eruptions from a volcano, releasing magma, gas, and debris with great force and often with little warning.