9.3 \(P\)-values

In a two-tailed \(t\)-test where \(n = 49\), what is the approximate \(P\)-value for the test if:

  1. \(t = -2.14\).
  2. \(t = 1.90\).
  3. \(t = 3.15\).
  4. \(t = -1.20\).
  5. \(t = -1.59\).
  6. \(t = 6.71\).

(Hint: Use the \(68\)--\(95\)--\(99.7\) rule.)

How would your answers change if these \(t\)-scores came from a one-tailed test?


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