STATISTICAL TECHNIQUES AND TOOLS
CONCEPT OF POINT AND INTERVAL ESTIMATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False, it’s a range of values
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Either A or B
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None of the above
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Detailed explanation-1: -False. The confidence interval is a range of plausible values for the population average. It does not provide a range for 95% of the data values from the population.
Detailed explanation-2: -As a rule of thumb, 95% confidence intervals provide a more narrow range of scores (higher accuracy) than 90% confidence intervals (slightly wider range of scores to allow for more variation). Most psychological tests report at the 95% confidence interval and are quite reliable, often more so than medical tests.
Detailed explanation-3: -What is a Confidence Interval? A confidence interval (CI) is a range of values that is likely to contain the value of an unknown population parameter. These intervals represent a plausible domain for the parameter given the characteristics of your sample data.