Which Reason Below Best Answers Why a Two-Tailed Hypothesis Should

question 15

Multiple Choice

Which reason below best answers why a two-tailed hypothesis should be used with an analysis of variance.

• A)the probability levels for ANOVA do not easily divide by 2 as in other tests
• B)the dependent variable in an ANOVA is nominal level
• C)the normal distribution assumption is not used,so a one-tailed curve does not exist
• D)it is too difficult to make predictions for multiple group comparisons in a single statement

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Definitions:

Experimental Studies

Research studies that manipulate conditions to examine the cause and effect relationship between variables.

Experimental Study

A research method where the investigator manipulates one or more variables to determine their effect on a dependent variable, often involving control groups.

Observational

Pertaining to data or a study method where the researcher observes subjects without manipulating any variables.

Nominal Scale

Refers to a classification system in statistics where data can be divided into non-numeric categories that are labeled or named; there is no intrinsic ordering to the categories.