Applet Exercise Refer to Example 7.6. Suppose that T has a t distribution with 5 df.
- a Use the applet Student’s t Probabilities and Quantiles to find the exact
probability that T is greater than 2. - b Use the applet Student’s t Probabilities and Quantiles to find the exact probability that T is less than −2.
- c Use the applet Student’s t Probabilities and Quantiles to find the exact probability that T is between −2 and 2.
- d Your answer to part (c) is considerably less than 0.9544 = P(−2 ≤ Z ≤ 2). Refer to Figure 7.3 and explain why this is as expected.
7.6 The tensile strength for a type of wire is
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Mathematical Statistics with Applications
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