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[Solution] A researcher has constructed an 80% confidence interval of = 45 8, using a sample of n = 25 scores. What would happen to the width of the interval

Question: A researcher has constructed an 80% confidence interval of = 45 8, using a sample of n = 25 scores.

  1. What would happen to the width of the interval if the research had used a larger sample size?
  2. What would happen the width of the interval if the researcher had used 90% confidence instead of 80%?
  3. What would happen to the width of the interval if the sample variance increased?

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