A Researcher Is Estimating the Average Difference Between Two Population

question 64

Multiple Choice

A researcher is estimating the average difference between two population means based on matched?pairs samples. She gathers data on each pair in the study resulting in: Assume that the data are normally distributed in the population. To obtain a 95% confidence interval, the table t value would be ___.

• A) 2.132
• B) 1.86
• C) 2.306
• D) 2.976
• E) 2.776

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Definitions:

Inferential Statistics

The branch of statistics that allows for making predictions or inferences about a population based on a sample of data.

Descriptive Statistics

Statistical methods that summarize and organize data into patterns and trends, without drawing conclusions or inferring beyond the data.

Correlation Coefficient

A statistical measure that calculates the extent to which two variables change together or the degree of association between them.

Correlate

To have a mutual relationship or connection, in which one thing affects or depends on another.