chapter 2

1) Identify the following variables as either qualitative or quantitative and EXPLAIN your answers.

a. The number of people on a jury.

b. The color of your house

2) Identify the number as either continuous or discrete and EXPLAIN your answers.

a. The average height of all freshmen entering college in a certain year is 68.4 inches.

b. The number of limbs on a 2-year-old oak tree is 21.

3) Determine which of the four levels of measurement is most appropriate and explain your answer.

a. Temperatures in degrees Fahrenheit of the ocean at various depths.

b. The rank of individuals in the military

c. The number of people with blue, brown and red hair in a classroom

4) Determine the following (show your work):

a. The speed of a new microprocessor is 800MHZ, but a new test of its speed gives a measurement of 820MHZ. What is the absolute error? What is the relative error?

b. Convert 1/16 to a percent

c. Convert 0.45 to a percent

d. Humanities majors spend an average of $115 per course on books. Mathematics majors spend an average of $70 per course on books.

What is the percent difference between the two amounts relative to the amount for mathematics majors (round to the nearest percent)?

e. Suppose that the cost of a statistics text was $50 in 1985 and is $100 in 2000. What is the “Statistics Text Index” number, rounded to the nearest tenth, for the 2000 edition with the 1985 price as the reference value?

0.28

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