One of the Key Developments Enabling the Union to Stop

question 39

Multiple Choice

One of the key developments enabling the Union to stop the Confederate thrust into the North at Antietam was

• A) General Lee's dilly-dallying and half-hearted offensive thrust at Antietam Creek.
• B) the Union's discovery of General Robert E. Lee's battle plans.
• C) Lincoln's removal of General McClellan from his command.
• D) the use of the new repeating rifle for the first time.
• E) the death of Stonewall Jackson during the battle.

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Definitions:

Degrees of Freedom

The number of independent pieces of information available to estimate another piece of information or the parameters in a statistical model.

Mean

The average value of a set of numbers, obtained by dividing the sum of all the numbers by the count of numbers.

Percentile Points

Points or values below which a certain percentage of observations in a dataset fall, used to measure the relative standing of a value within a dataset.

F Distribution

A probability distribution that arises in the analysis of variance and is used in hypothesis testing and confidence interval estimation for two sample variances.