If a Represents a Negative Number and B Represents a Positive

question 87

Multiple Choice

If a represents a negative number and b represents a positive number, which of the following products results in a positive answer ?

• A) \(- ( - a ) ( - b )\)
• B) \(( - a ) ( - b )\)
• C) \(( - a ) ( a )\)
• D) \(( - b ) ( b )\)

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Definitions:

Two-sample T Procedures

Statistical methods used to compare the means of two independent groups under the assumption of normally distributed populations.

One-sample T Procedures

Statistical tests used to determine whether the mean of a single sample differs significantly from a known or hypothesized population mean.

Confidence Interval

An interval estimate used to quantify the uncertainty of an estimated population parameter.

Pooled Variance

An estimate of the variance that is calculated by combining the variances from two or more samples, assuming they have the same population variance.