A Test of Spelling Ability Is Given to a Random

question 101

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.What do you conclude at α = .01? Use confidence intervals to draw your conclusion.

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Definitions:

Confidence Interval

A confidence interval is a range of values, derived from statistical analysis, that is likely to contain the value of an unknown population parameter.

Maximum Oxygen Uptake

The maximum rate at which an individual can use oxygen during intense or maximal exercise, reflecting physical fitness.

Normal Distribution

A probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean. Also known as a bell curve.

Physical Fitness

The ability to perform aspects of sports, occupations, and daily activities without undue fatigue.