Recommended Intakes for Vitamin D Are Difficult to Establish Because

question 28

Multiple Choice

Recommended intakes for vitamin D are difficult to establish because

• A) exposure to sunlight varies.
• B) it is present in so many foods.
• C) the body stores such large amounts.
• D) the amount in food varies with the season.

---

Definitions:

Null Hypothesis

A hypothesis in statistical inference and testing that suggests no significant difference or effect, intending for it to be challenged by the alternative hypothesis.

Multiple Regression Model

A statistical technique that models the relationship between a dependent variable and two or more independent variables.

Independent Variables

Variables in an experiment or model that are manipulated to observe their effect on dependent variables.

Life Expectancy

Life expectancy is a statistical measure of the average time an organism is expected to live, based on factors like the year of their birth, their current age, and demographic factors.