Average Battery Life Narrative

question 116

Essay

Average Battery Life Narrative
The average life of a certain type and brand of battery is 75 weeks. The average life of each of nine randomly selected batteries is as follows: 74.5, 75.0, 72.3, 76.0, 75.2, 75.1, 75.3, 74.9, and 74.8. Assume the battery life distribution is normal. Do the sample data suggest the average life is smaller than 75 weeks?
-Refer to Average Battery Life Narrative. Compute the approximate p-value associated with the test statistic in question 54. Do the sample data support the alternative hypothesis at the = 0.05 level? Justify your conclusion.

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Definitions:

Harmonic Distortion

A distortion that occurs in a signal when there are frequencies in the output that are integer multiples of the fundamental frequency, affecting the signal's waveform.

Sequence

A progression or arrangement of elements in a particular order, often used in reference to electrical phases or operations.

Phasor Rotation

The rotation of a phasor, which is a vector representing a sinusoidally varying quantity, in the complex plane, typically used in the analysis of AC circuits.

Fundamental Waveform

The basic frequency component of an alternating current or voltage, corresponding to the fundamental frequency of the system.