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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.


Definitions:

Townshend Duties

A series of British Acts passed in 1767 imposing taxes on the American colonies on goods such as tea, paper, and glass, leading to widespread protest.

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