Two Hundred Students Are Enrolled in an Economics Class

question 106

Essay

Two hundred students are enrolled in an Economics class.After the first examination, a random sample of 6 papers was selected.The scores were 65, 75, 89, 71, 70, and 80.
a.
Determine the standard error of the mean.
b.
What assumption must be made before we can determine an interval for the mean score of all the students in the class? Explain why.
c.
Assume the assumption of Part b is met.Provide a 95% confidence interval for the mean score of all the students in the class.

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Definitions:

Research Study

A systematic investigation designed to develop or contribute to generalizable knowledge.

Self-report Measures

Assessment tools that rely on individuals' own accounts of their feelings, thoughts, or behaviors, often through questionnaires or interviews.

Questionnaire

A research instrument consisting of a series of questions for the purpose of gathering information from respondents.

Reliable

The extent to which a measure, test, or instrument yields consistent and stable results across different occasions.