For the Statements Below,which Is(are)TRUE for Confidence Intervals

question 9

Multiple Choice

For the statements below,which is(are) TRUE for confidence intervals?
I As the percentage confidence increases,the confidence interval range decreases.
II Confidence intervals are calculated using the calculated mean and standard deviation of a set of n measurements;and the results of the F test.
III The 95% confidence interval will include the true population mean for 95% of the sets of n measurements.

• A)I only
• B)II only
• C)I and III
• D)I and II
• E)III only

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Definitions:

One-Sample F-Test

A statistical test used to compare the variance of a sample to a known variance.

Statistical Significance

A statistical measure that helps to determine whether the observed findings are unlikely to have occurred by chance.

T Value

A value calculated from sample data used to assess whether a null hypothesis should be rejected in the context of a t-test.

Population's Standard Deviation

A measure of the dispersion or spread of scores within a given population, indicating the average distance from the mean.