Part 1:
  1. Based on the last 300 UO Duck football games, the average points scored by the opposition was 23 points with a dispersion of 7 points. Therefore, 2/3 of the time that you attend a duck football game you would expect the opposition to score between

    1. 23 and 30 points
    2. 16 and 23 points
    3. 16 and 30 points
    4. 23 and 37 points
    5. insufficient information to know

  2. Based on the Duck football game data, a 1 in 100 scoring event by the opposition would be

    1. more than 23 points
    2. more than 30 points
    3. more than 37 points
    4. more than 41 points
    5. more than 45 points



  3. The grading scale in dispersion units on some midterm is the following:

    • > +2.00 --> A+
    • 1.35 -- 2.00 --> A
    • +0.95 -- 1.35 --> A-
    • +0.50 -- 0.95 --> B+
    • +0.20 -- 0.50 --> B
    • -0.10 -- +0.20 --> B-
    • -0.50 -- -0.10 --> C+
    • -1.35 -- -0.50 --> C
    • -2.00 -- -1.35 --> C-
    • -2.30 -- -2.00 --> D+
    • -2.70 -- -2.30 --> D

    You take the midterm which had an average of 70 our of 120 points with a dispersion of 10 points. Your scored 55 points on the midterm. Your grade would therefore be:

    1. C+
    2. C
    3. C-
    4. D+
    5. D

  4. For that same midterm, to earn an A+ you would have to score more than

    1. 90 points
    2. 95 points
    3. 100 points
    4. 110 points
    5. 115 points



  5. The Columbia River near Pasco has had about 100 years worth of flood measurements made. Those data indicate a mean flood of +9.0 feet with a dispersion of 5.0 feet around that mean. Based on this data what would be the flood stage of a "1000" year flood?

    1. 9.0 feet
    2. 14.0 feet
    3. 19.0 feet
    4. 24.0 feet
    5. can't tell from the data given



    Part II:

    A survey of 25 gas stations in the Eugene Area showed an average price for unleaded gas of $1.25 per gallon with a dispersion of 10 cents. A survey of 25 stations in the Portland area had an average of $1.35 per gallon with a dispersion of 10 cents. A survey of 50 stations in the Seattle area had an average of $1.30 per gallon with a dispersion of 21 cents.

  6. What is the probability that in Eugene you will pay more than $1.45 per gallon?

    1) 50% 2) 15% 3) 5% 4) 1% 5) .1 %

  7. What is the probability that in Portland you will pay more than $1.45 per gallon?

    1) 50% 2) 15% 3) 5% 4) 1% 5) .1 %

  8. Which location has the highest probability of paying $1.50 or more per gallon.

    1) Eugene 2) Portland 3) Seattle

  9. About how many gas stations would I have to go to in Eugene to find a price of $1.00 per gallon?

    1) 10 2) 25 3) 50 4) 100 5) 1000

  10. The difference in mean gas prices between Eugene and Portland is

    1) not significant 2) marginally sig. 3) sig. 4) highly sig