Statistics: Confidence Intervals

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SUMMARY

Mr. K aims to determine the percentage of the senior class that has watched the movie Groundhog Day with a 90% confidence interval and a margin of error of 5%. To achieve this, he must calculate the required sample size using the formula for confidence intervals for proportions. The discussion emphasizes the importance of understanding the concepts of sample size determination and confidence intervals in statistics.

PREREQUISITES
  • Understanding of confidence intervals in statistics
  • Knowledge of sample size calculation methods
  • Familiarity with proportions and their significance
  • Basic statistical terminology and concepts
NEXT STEPS
  • Learn how to calculate sample size for confidence intervals
  • Study the formula for confidence intervals for proportions
  • Explore the concept of margin of error in statistical surveys
  • Review statistical software tools for performing sample size calculations
USEFUL FOR

Students, educators, and statisticians interested in survey methodology and confidence interval calculations will benefit from this discussion.

jlo2006
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Heres the problem:

Mr. K would like to know what percentage of the senior class has watched the movie Groundhog Day. He would like to be sure to within 0.05 or 5%. He wants to compute a 90% confidence interval. How many students must he poll in order to achieve these goals?

Help Please. Greatly Appreciated.
 
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