University of Phoenix Material
Week 1 Practice Worksheet
Prepare a written response to the following questions.
Chapter 1
1. Explain and give an example for each of the following types of variables:
a. Nominal: A nominal would describe a name of your school or car. For example, my high school name was East Bronx Academy and I have a Nissan Altima as a car.
b. Ordinal: This term refers to order. An example of this would be 1st, 2nd, 3rd and 4th place with a race.
c. Interval: This term shows data that is split. An example of an interval include the temperature shown on a thermometer.
d. Ratio scale: A ratio scale has a zero sub point. An example of this would be a clock.
e. Continuous: Continuous describes a set. So if numbers 1 and 10 are a set then every number in-between 1-10 are sets also.
f. Discrete: discrete variables cannot take on different values. Flipping a coin and counting how many times it lands on heads would count as a discrete value.
g. Quantitative: Quantitative shows how many. So if I was to say my quantitative was six that means I had six items. This is my measurement in numbers.
h. Qualitative: Qualitative shows observed data that is not measured. So this can now be the color of my ducks which would be yellow.
2. Following are the speeds of 40 cars clocked by radar on a particular road in a 35-mph zone on a particular afternoon:
30, 36, 42, 36, 30, 52, 36, 34, 36, 33, 30, 32, 35, 32, 37, 34, 36, 31, 35, 20
24, 46, 23, 31, 32, 45, 34, 37, 28, 40, 34, 38, 40, 52, 31, 33, 15, 27, 36, 40
Make a frequency table and a histogram, then describe the general shape of the distribution.
Speed of 40 Cars
Frequency
30
3
24
1
36
6
46
1
42
1
1
23
31
32 3
3
52 2
45...