In Constructing a 95% Interval Estimate for the Ratio of Two

question 33

Short Answer

In constructing a 95% interval estimate for the ratio of two population variances, $$\sigma _ { 1 } ^ { 2 }$$ / $$\sigma _ { 2 } ^ { 2 }$$ , two independent samples of sizes 30 and 40 are drawn from the populations. If the sample variances are 425 and 675, then the upper confidence limit is about: $$\begin{array} { | l | l | } \hline \text { A. } & 1.2215 . \\\hline \text { B. } & 0.3132 . \\\hline \text { C. } & 1.2656 . \\\hline \text { D. } & 0.3246 . \\\hline\end{array}$$

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Definitions:

Unlearned Reaction

A natural, instinctive response to a stimulus that occurs without the need for prior learning or experience.

Reflexive Reaction

An automatic, involuntary response to a stimulus.

Unconditioned Stimulus

In classical conditioning, a stimulus that naturally and automatically triggers a response without any learning needed.

Conditioned Stimulus

A previously neutral stimulus that, after association with an unconditioned stimulus, comes to trigger a conditioned response.