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The grade point averages of 30 randomly selected students in a large algebra class are used to construct a confidence interval for the grade point
The grade point averages of 30 randomly selected students in a large algebra class are used to construct a confidence interval for the grade point averages of all of the algebra students. What is the effect on the width of the confidence interval if the sample size is increased to 50? a. The width remains the same. b. The width increases. c. The width decreases. d. It is impossible to tell without more information.
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