For One-Third to One-Half of Patients with OCD, the Onset

question 8

Multiple Choice

For one-third to one-half of patients with OCD, the onset of the symptoms is

• A) After the age of 30 years
• B) In the 30s and 40s
• C) During childhood or adolescence
• D) In middle age

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Definitions:

Expected Frequency

The theoretically calculated frequency of an event or outcome based on the probabilities in a statistical experiment, often compared to observed frequencies in chi-squared tests.

Test Statistic

A statistic calculated from sample data, used to determine whether to reject the null hypothesis.

Coin

A flat, typically round piece of metal with an official stamp, used as money.

Heads

One of the two possible outcomes when flipping a standard coin, the other being tails.