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Find the following critical numbers: 90% confidence interval for n = 13 98% confidence interval for n = 15 80% confidence interval for n =

  1. Find the following critical numbers:
    1. 90% confidence interval for n = 13
    2. 98% confidence interval for n = 15
    3. 80% confidence interval for n = 45
    4. 95% confidence interval for n = 22

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