TABLE 8-4
The actual voltages of power packs labeled as 12 volts are as follows: 11.77, 11.90, 11.64, 11.84, 12.13, 11.99, and 11.77.
-Referring to Table 8-4, a 90% confidence interval calculated from the same data would be narrower than a 99% confidence interval.

Question

Quizplus · Accepted Answer

This is because a 99% confidence interval is wider than a 90% confidence interval as it includes more extreme values to provide a higher level of certainty about the population parameter.

TABLE 8-4 The Actual Voltages of Power Packs Labeled as 12 Volts