Calculate the 95% Confidence Interval for a Sample with a Mean

question 90

Multiple Choice

Calculate the 95% confidence interval for a sample with a mean = 249.60 and a population standard error of the mean = 9.13.

• A) 95% CI = 249.60 ± 17.89
• B) 95% CI = 249.60 ± 15.06
• C) 95% CI = 249.60 ± 23.56
• D) 95% CI = 249.60 ± 11.09

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Definitions:

Synchronizers

Devices in a manual transmission that help match the speed of the gears, facilitating smooth gear changes.

Truck Transmission

The system in a truck that transmits power from the engine to the drive axle, allowing for changes in speed and torque.

Rotational Speed

The number of turns or revolutions per unit of time; commonly measured in revolutions per minute (RPM).

Twin Countershaft Transmission

A type of manual transmission found in heavy vehicles, using two parallel shafts to allow for a wider range of gears.