Xiao Is Gathering Research on the Number of Meals People

question 58

Multiple Choice

Xiao is gathering research on the number of meals people eat. He gathers data about the number of daily meals eaten by 25 people at each of the following ages-10, 20, 30, 40, 50, 60, and 70 years-over the course of one week, and looks for developmental differences. What type of research design is Xiao using?

• A)Continuous
• B)Cross-sectional
• C)Sequential
• D)Longitudinal

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Definitions:

Biased Estimator

An estimator is considered biased if it consistently overestimates or underestimates the parameter it is estimating.

Confidence Level

The probability that a confidence interval contains the true population parameter, expressing the degree of certainty in estimation.

Sample Statistic

A numerical measure that describes an aspect of a sample of the population data.

Population Parameter

A numerical value that describes a characteristic of the entire population.