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A statistic is a calculation based on sample data that estimates a population parameter.
Question 1 options:
In a statistical study, the population is the total group of interest that we hope to understand by taking a sample (smaller group) from it.
Question 2 options:
In observational research a researcher is "invisible" to the participants. They do not influence or provide treatments, advertisements, sample products, etc. that would change a participants normal behavior or decisions.
Question 3 options:
Convenience sampling is the preferred sampling method for all research because it does not introduce bias into the study.
Question 4 options:
Three measures of Central Tendency are variance, range and percentile rank.
Question 5 options:
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