If a Sample of Size 200 Has 40 Successes,the Lower

question 10

Multiple Choice

If a sample of size 200 has 40 successes,the lower limit of a confidence interval at the 95% level of confidence for the population proportion is:

• A)0.2554
• B)0.1446
• C)0.2465
• D)0.1535

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Definitions:

Placebo Effect

A psychological phenomenon where patients experience perceived or actual improvements in their condition due to their belief in the efficacy of a treatment that is inert or not specifically effective for the condition being treated.

Fake Treatment

A placebo or sham treatment, with no therapeutic effect, used as a control in testing new drugs or treatments.

Control Group

In experimental research, a group of subjects that does not receive the treatment being tested, used as a benchmark to measure the effect of the treatment on another group.

Operational Definition

A clear, precise description of a variable in terms of the procedures or operations used to measure or identify it.