TABLE 8-5
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 8-5, a confidence interval estimate of the population mean would only be valid if the distribution of voltages is normal.

Question

Quizplus · Accepted Answer

A confidence interval estimate of the population mean is only valid if the sample follows a normal distribution.

TABLE 8-5 The Actual Voltages of Power Packs Labeled as 12 Volts