Which of the following is a possible null hypothesis for a two-tailed hypothesis test?
A) $\bar{x}=30$
B) $\mu \neq 30$
C) $\mu \geq 30$
D) $\mu=30$

Question

Quizplus · Accepted Answer

The null hypothesis is typically a statement of no effect or no difference and is often stated as an equality. In a two-tailed hypothesis test, the null hypothesis is that the population mean ($\mu$) is equal to a specific value (in this case, 30). Therefore, option D ($\mu=30$) is the correct formulation of a possible null hypothesis for a two-tailed hypothesis test.

Which of the Following Is a Possible Null Hypothesis for a Two-Tailed