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In a study of habits of undergraduate students, a researcher sampled 53 students and found that...

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Statistics

  1. In a study of habits of undergraduate students, a researchersampled 53 students and found that the mean number of classesmissed over the course of a school year was 18. Assume thepopulation standard deviation, σ = 5.7.
    1. (5 points) Calculate the 95% confidence interval for the meannumber of classes missed during the school year by undergraduatestudents.
  1. (2 points) If the researcher had sampled 75 students, would themargin of error be larger or smaller?
  1. (2 points) If the researcher used a 90% confidence levelinstead of 95%, would the margin of error be larger orsmaller?

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