You Do It

  1. 35.

    1. 1

    2. 50

    3. 4(100/50) = 8

    4. 0.00468

  2. 37.

    1. 4

    2. 40

    3. (100 + 25 + 25 + 25 + 225)/40 = 10

    4. 0.0404

  3. 39.

    1. (0 + 20 + 2 × 9 + 3 × 14 + 4 × 5)/60 ≈ 1.667

    2. 60 × exp(− 1.667) ≈ 11.33

    3. 5 − 1 − 1 = 3

    4. 6.16 (P(4 or more) = 0.0883)

    5. 0.104

  4. 41.

    1. χ2 = 9.345, p = 0.025 (3 df)

    2. Long-term customers make significantly different types of complaints than recent customers do. Long-term customers complain more often about billing errors, and complain less often about salespeople.

  5. 43.

    1. Not normal (fat tails)

    2. Expected counts become too small for χ2.

    3. χ2 = 49.16, with p-value 0.

    4. Yes

    5. Plot does not require conversion to categories; χ2 gives a p-value so we can draw a conclusion.

  6. 45.

    1. Large values of χ2 indicate that the percentage of holes scored better or worse than par differ ...

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