<ol>
<li>When performing a test of significance about a population mean, a t-distribution, instead of a normal
distribution, is often utilized. Which of the following is the most appropriate explanation for this?
(A)The sample size is not large enough to assume that the population distribution is normal.
(B)The sample does not follow a normal distribution.
(C)There is an increase in the variability of the test statistic due to estimation of the population
standard deviation.
(D)The sample standard deviation is unknown.
(E)The population standard deviation is too large.</li>
</ol>
<p>gosh i suck at stats.
is it D or C?</p>