You generate a 95% confidence interval for the mean carapace width of dungeness crabs, which is

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Question:

You generate a 95% confidence interval for the mean carapace width of dungeness crabs, which is 141 +/-18 millimeters. Which answer below could you use to improve your estimate (i.e. make your margin of error smaller)?

  1. Increase the confidence level to 99%.
  2. Invoke the Central Limit Theorem.
  3. Increase the number of crabs in your sample
  4. Eat one out of every 10 crabs in your sample so that you don’t get hungry while you’re making measurements..

We are given that: a 95% confidence interval for the mean carapace width of dungeness crabs, which is 141 +/-18 millimetres.

We have to make margin of error smaller than existing margin of error.

Margin of Error is given by formula: