A Sample Is Used to Obtain a 95% Confidence Interval

question 21

True/False

A sample is used to obtain a 95% confidence interval for the mean of a population.The confidence interval goes from 78.21 to 87.64.If the same sample had been used to test the null hypothesis that the mean of the population differs from 90,the null hypothesis could be rejected at a level of significance of 0.05.

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Definitions:

Discard Limit

The specified point of wear or damage at which a component or part is no longer considered safe or functional and must be replaced.

Parallelism

The extent to which the friction surface of a brake disc varies in thickness. Slight variations in rotor thickness result in brake pedal pulsation as the pads must move in and out to compensate. Also called taper or thickness variation.

Runout

The degree of wobble or deviation from true circular rotation often related to rotors or wheels.

Rotor Parallelism

The degree to which both sides of a brake rotor are equidistant to each other, essential for smooth braking.