Test Yourself! AP Statistics Trivia Questions Quiz

5 Questions

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Test Yourself! AP Statistics Trivia Questions Quiz

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Questions and Answers
  • 1. 
    The following boxplots summarize two data sets, X and Y. Which of the following must be true?
    • A. 

      Set X and set Y have the same number of data points.

    • B. 

      The shaded box of set X contains more data points than the shaded box of set Y.

    • C. 

      The data set X have a larger range than the data in set Y.

    • D. 

      About 50% of the values in set X are greater than about 75% of the values in set Y.

    • E. 

      The median of set X is less than the median of set Y.

  • 2. 
    Two measures, x and y, are taken on numerous subjects, and a least squares regression equation is computed. The resulting equation is predicted y = 382.1 - 12.25x. A correct interpretation for the slope and intercept is:
    • A. 

      For every increase of 100 units in x, y increases approximately 1225 units; when x = 0, y is predicted to be 382.1.

    • B. 

      For every increase of 100 units in x, y decreases approximately 1225 units; when x = 0, y is predicted to be 382.1.

    • C. 

      For every increase of 100 units in x, y increases approximately 32,810 units; when x = 0, y is predicted to be 12.25.

    • D. 

      For every increase of 100 units in x, y decreases approximately 1225 units; when x = 0, y is predicted to be 12.25.

    • E. 

      For every increase of 100 units in x, y increases approximately 1225 units; when x = 0, y is predicted to be -12.25.

  • 3. 
    Which of the following sampling designs does not contain a source of bias?
    • A. 

      A politician would like to know how her constituents feel about a particular issue. As a result, her office mails questionnaires about the issue to a random sample of adults in her political district.

    • B. 

      A company uses the telephone directory to randomly select adults for a telephone survey to gauge their feelings toward items manufactured by the company.

    • C. 

      An interviewer selects a random sample of individuals to question about a particular issue. Since some of the individuals are not informed about the issue, the interviewer gives background and his personal view on the issue before recording their responses.

    • D. 

      A news show asks viewers to call a toll-free number to express their opinions about a recent high-publicity trial.

    • E. 

      One thousand numbered tickets are sold as a fund-raiser. Five numbers are chosen randomly, and the individuals with the winning ticket numbers each win $10.

  • 4. 
    A class of statistics students scored the following grades on a ten point quiz:  5, 2, 4, 6, 7, 9, 8, 10, 10, 6, 7, 7, 10, 4, 2.  Their teacher, who sets a passing grade at 70%, looks at the distribution and see that it is
    • A. 

      Skewed right with about 50% of the class passing.

    • B. 

      Skewed left with about 50% of the class passing.

    • C. 

      Skewed right with about 50% of the class failing.

    • D. 

      Nearly symmetric with one outlier.

    • E. 

      Nearly symmetric with no outliers.

  • 5. 
    Suppose that 25% of horses live over 23.4 years, while 85% live less than 25.2 years.  Assuming the ages of horses are normally distributed, what are the mean and standard deviation for the life expectancy of horses?
    • A. 

      20.14 and 4.86

    • B. 

      22.69 and 1.052

    • C. 

      22.69 and 4.97

    • D. 

      24.11 and 1.052

    • E. 

      Not enough information is given to find the mean and s.d.