A Researcher Is Interested in the Possible Effect of Teacher-Student

question 27

Multiple Choice

A researcher is interested in the possible effect of teacher-student ratios on students' learning.She finds 10 fifth-grade classrooms with 30-40 students per class and 10 others with 15-25 students per class.She discovers that there is a correlation between class size and student achievement.Which one of the following conclusions can we draw from this study?

• A)Class size can help us predict school achievement.
• B)Classes should be as large as is reasonably possible.
• C)Classes should be as small as is reasonably possible.
• D)The researcher has conducted a descriptive study.

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Definitions:

Sample Mean

The average value of a sample, calculated by summing all observations and dividing by the number of observations.

Sampling Distribution

The probability distribution of a given statistic based on a random sample, underlying the principle of estimation in inferential statistics.

Mean

The arithmetic average of a set of numeric values, calculated by adding all the values together and dividing by the number of values.

Infinite Population

A theoretical or practical concept where the population size approaches infinity, making it impractical or impossible to study every individual in the population.