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goldenfox
[79]
3 years ago
8
A given poll states “54% of fifth graders read at or above the fifth-grade-level.” If there is a stated margin of error of +/- 2
.5%, what is the 95% confidence interval for this statistic?
Mathematics
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marta
[7]
3 years ago
7
0
The z-score fo a 95% confidence interval is 1.96
Confidence interval of a statistic is given by
Therefore, we are 95% confident that the proportion of fifth graders who read at or above the fifth grade level is between 49.1 and 58.9.
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