Instruction 2-5
the Following Are the Durations in Minutes of a Sample

question 74

Multiple Choice

Instruction 2-5
The following are the durations in minutes of a sample of long-distance phone calls made within Australia reported by one long-distance carrier.
$$\begin{array}{l}\begin{array} { l c } &\text { Relative }\\\text { Time (in Minutes) } & \text { Frequency } \\\hline 0 \text { but less than } 5 & 0.37 \\5 \text { but less than } 10 & 0.22 \\10 \text { but less than } 15 & 0.15 \\15 \text { but less than 20 } & 0.10 \\\text { 20 but less than 25 } & 0.07 \\25 \text { but less than } 30 & 0.07 \\30 \text { or more } & 0.02\end{array}\end{array}$$
-Referring to Instruction 2-5,if 100 calls were sampled,________ of them would have lasted less than 15 minutes.

• A)10
• B)26
• C)74
• D)None of the above.

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Definitions:

Object of the Phobia

The specific subject or situation that triggers an irrational and excessive fear in an individual suffering from a phobia.

Shaping Procedure

A method of training by which successive approximations toward a target behavior are reinforced.

Electroconvulsive Therapy

A psychiatric treatment in which seizures are electrically induced in patients to relieve severe mental disorders.

Systematic Desensitization

A technique used in behavior therapy to treat phobias and other behavior problems involving anxiety, by gradually exposing the patient to the anxiety-producing stimulus in a controlled environment.