Test Hypotheses About a Population Mean with Unknown
-Find the Standardized

Multiple Choice

Test Hypotheses about a Population Mean with Unknown
-Find the standardized test statistic t for a sample with $\mathrm { n } = 12 , \overline { \mathrm { x } } = 18.5 , \mathrm {~s} = 2.1$ , and $\alpha = 0.01$ if $\mathrm { H } _ { 1 } : \mu \neq 19$ . Round your answer to three decimal places.

A) $- 0.825$
B) $- 0.008$
C) $- 0.037$
D) $- 0.381$