AP Statistics Practice Test! Trivia Quiz

5 Questions

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AP Statistics Practice Test! Trivia Quiz

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Questions and Answers
  • 1. 
    Moving times (in minutes) and weights (in pounds) were recorded for a random sample of 20 moving jobs requiring three-man crews, and the results of the regression analysis are shown below.  The equation for the least squares regression line is:
    • A. 

      Predicted weight = 21.84 + 0.037(Time)

    • B. 

      Predicted time = 21.84 + 0.037(Weight)

    • C. 

      Predicted weight = 25.54 + 0.003(Time)

    • D. 

      Predicted time = 25.54 + 0.003(Weight)

    • E. 

      Predicted time = 0.037 + 21.84(Weight)

  • 2. 
    The cause of death and the age of the deceased are recorded for 454 patients from a hospital.  Use these values to estimate the probability that a person at this hospital died as a result of an accident if it is known the person was between the ages of 45 and 54.
    • A. 

      0.0264

    • B. 

      0.0976

    • C. 

      0.1322

    • D. 

      0.2000

    • E. 

      0.4878

  • 3. 
    The median of a distribution is 150, and the interquartile range is 50.  Identify the statement(s) that must be true. (I). Approx. 50% of the data are between 125 and 175. (II). Approx. 50% of the data are less than or equal to 150. (III). Approx. 75% of the data are greater than 125.
    • A. 

      I only

    • B. 

      II only

    • C. 

      I and III only

    • D. 

      II and III only

    • E. 

      I, II, and III

  • 4. 
    For Hospital A, the average waiting time (time between walking in the door and seeing a doctor) in the emergency room is 135 minutes with a standard deviation of 45 minutes.  For Hospital B, the average waiting time in the emergency room is 90 minutes with a standard deviation of 22.5 minutes.  In which hospital are you more likely to wait less than 45 minutes?  Assume the distribution of waiting times is normal.
    • A. 

      Hospital B, because the average wait-time is only 90 minutes, rather than 135 minutes in Hospital A.

    • B. 

      Hospital A, because with twice the standard deviation of Hospital B, it has twice the spread.

    • C. 

      Neither, because for both hospitals, the probability of waiting less than 45 minutes is 2.275%.

    • D. 

      Neither, because for both hospitals, the probability of waiting less than 45 minutes is 97.725%.

    • E. 

      It is impossible for any patient to wait less than 45 minutes in either hospital unless the patient is in critical condition.

  • 5. 
    A regression equation is given as log(y-hat) = 0.214 - 1.28(x).  What is the (approximate) predicted value for y when x = 2?
    • A. 

      - 2.346

    • B. 

      - 0.171

    • C. 

      0.005

    • D. 

      0.167

    • E. 

      Cannot be determined.