You Do It

  1. 39.

    1. Type of Day by Grade of Gasoline

      Count Premium Plus Regular Total
      Weekday 126 103 448 677
      Weekend 63 29 115 207
      Total 189 132 563 884

    2. Premium: 19%; Plus: 15%; Regular: 66%

    3. Weekdays: 67%; Weekend: 33%

    4. No. These conditional distributions are not directly comparable.

    5. Weekends, because there is a greater concentration of premium sales then.

  2. 41.

    1. χ2 = 13.326, V = 0.12

    2. V is rather small, indicating weak association between the type of gas and the timing of the purchase.

  3. 43.

    1. Question Wording by Satisfaction

      Count Very dissatisfied Somewhat Dissatisfied Some what satisfied Very satisfied Total
      Dissatisfied 23 20 69 128 240
      Satisfied 10 12 82 139 243
      Total 33 32 151 267 483

    2. Those surveyed using the word ...

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