In Performing a Hypothesis Test Where the Null Hypothesis Is $\textbf{ not }$

Multiple Choice

In performing a hypothesis test where the null hypothesis is that the population mean is 6.9 against the alternative hypothesis that the population mean is $\textbf{ not }$ equal to 6.9, a random sample of 16 items is selected. The sample mean is 7.1 and the sample standard deviation is 2.4. It can be assumed that the population is normally distributed. The level of significance is selected as 0.05. The critical t value for this problem is ___.

A) 1.753
B) 2.947
C) 2.120
D) 2.131
E) 2.311