Question 1086946
<font color="black" face="times" size="3">The parameter {{{mu = 17}}} is NOT in the confidence interval {{{18.5 < mu < 21.5}}}. Because it's outside the confidence interval, we reject the null hypothesis (H0).


Answer: <font color=red>a. be rejected because 17.0 is less than 18.5.</font>
which essentially is another way of saying "the parameter is outside the confidence interval"</font>