The Student t distribution is
A) the distribution of the sum of m squared independent standard normal random variables.
B) the distribution of a random variable with a chi-squared distribution with m degrees of freedom, divided by m.
C) always well approximated by the standard normal distribution.
D) the distribution of the ratio of a standard normal random variable, divided by the square root of an independently distributed chi-squared random variable with m degrees of freedom divided by m.
Ans: D) the distribution of the ratio of a standard normal random variable, divided by the square root of an independently distributed chi-squared random variable with m degrees of freedom divided by m.
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__________ are backup or secondary plans to be used in case the first plan does not work out
a. Unilateral b. Directional c. Multilateral d. Contingency