A Contrast Expresses an Effect in the Population as a Combination

question 63

Multiple Choice

A contrast expresses an effect in the population as a combination of population means,of the form .The contrast can be estimated or tested using the sample data.Which of the following statements about or properties of contrasts is/are FALSE?

• A)The corresponding sample contrast is .
• B)The coefficients of the contrast must sum to one, .
• C)The standard error of a sample contrast is given by .
• D)To test the hypothesis that the population contrast = 0,the test statistic is ,which follows the t distribution with DFE associated with From the ANOVA.
• E)The confidence interval for Takes the form ,where Is the appropriate value of the t(DF
• E)distribution.

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Definitions:

Shields

Devices or means used to protect oneself from harm or danger.

Blocking

A process or action that obstructs, prevents, or restricts movement or progress, often used in various contexts such as psychology, sports, and technology.

Goals

Objectives or desired outcomes that an individual or group aims to achieve.

Visualize

The act of forming a mental image or vision of something, often used as a technique in planning or meditation.