For Exercises 65–71, do the following.

  1. List the elements and the variables.
  2. Identify the qualitative variables and the quantitative variables.
  3. For each quantitative variable, indicate whether it is discrete or continuous.
  4. For each variable, identify the level of measurement.
  5. Provide the observation for the indicated element.

Question 1.75

67. Genetically Engineered Crops. Genetically engineered (GE) crops are now planted on the majority of acreage in many states around the country. GE corn comes in three varieties: insect-resistant, herbicide-tolerant, and stacked genes. The following table contains the proportion of the corn grown in each of five states that is GE, along with the GE type most prevalent in each state, for 2013.5 Do (a)–(d), and then provide the observation for the state of Texas.

State Proportion
of GE corn		 Most prevalent type
Texas 89% Herbicide-tolerant
Missouri 92% Insect-resistant
Minnesota 91% Herbicide-tolerant
Ohio 85% Herbicide-tolerant
South Dakota 96% Herbicide-tolerant

1.2.67

(a) Elements: States Texas, Missouri, Minnesota, Ohio, and South Dakota; Variables: proportion of GE corn and most prevalent type.

(b) Qualitative variables: most prevalent type; quantitative variables: proportion of GE corn (c) proportion of GE corn—ratio; most prevalent type—nominal (d) proportion of GE corn—continuous (e) 89%, herbicide-tolerant