What Does "Seasonal Adjustment" Mean

question 5

Multiple Choice

What does "seasonal adjustment" mean?

• A) Data are seasonally adjusted if we take out changes that occur in about the same size and same time every year.
• B) Data are seasonally adjusted when we ignore the effects of one-time events such as strikes and hurricanes.
• C) Data are seasonally adjusted if we report the average for this month over several past years, not just this one month's data.
• D) Data are seasonally adjusted if we report the average for the past four months, not just this month's data.

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Definitions:

Null Hypothesis

The default hypothesis that there is no significant difference or relationship between specified populations, any observed effect is due to sampling or experimental error.

Interaction

In the context of statistics and experimental design, interaction refers to a situation where the effect of one independent variable on the dependent variable varies according to the level of another independent variable.

Factorial ANOVA

A statistical test used to examine the effects of two or more independent variables on a dependent variable simultaneously.

Pet Food

Specially formulated food items designed to meet the nutritional needs of domestic pets.