You wish to test the following claim ($\displaystyle {H}_{{a}}$) at a significance level of $\displaystyle \alpha={0.001}$.

      $\displaystyle {H}_{{o}}:\mu={69.9}$
      $\displaystyle {H}_{{a}}:\mu<{69.9}$

You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of size $\displaystyle {n}={548}$ with mean $\displaystyle \overline{{x}}={68.6}$ and a standard deviation of $\displaystyle {s}={8.6}$.

What is the test statistic for this sample? (Report answer accurate to three decimal places.)
test statistic =

What is the p-value for this sample? (Report answer accurate to four decimal places.)
p-value =

The p-value is...

This test statistic leads to a decision to...

As such, the final conclusion is that...