A Test of Spelling Ability Is Given to a Random

question 4

Essay

A test of spelling ability is given to a random sample of 10 students before and after they complete a spelling course.The mean score before the course was 119.60,and after the course the mean score was 130.80.The standard deviation of the difference is 16.061.Calculate a 99 percent confidence interval.

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Definitions:

Certified

A designation given to individuals or products that have met predetermined standards or requirements, often through successful completion of an examination or evaluation.

Critical Thinking

The analytical thought process involving the evaluation of facts and arguments to form a rational judgement.

Physical Abuse

The infliction of bodily injury or harm intentionally by another person, which can include hitting, burning, or any other physical attack.

Critical Thinking

The process of actively analyzing, synthesizing, and evaluating information gathered from observation, experience, reflection, or communication.