The height of President George W. Bush is considered a variable.
MAT135 Introduction to Statistics and Data Analysis
Module 1 TEST
Test #1
NAME_______________________
I. True or False
1. ______________ The height of President George W. Bush is considered a variable.
2. ______________ Probability is used as a basis for inferential statistics.
3. ______________ The variable age is an example of a qualitative variable.
4. ______________ The boundary of a variable such as 6 inches would be 5.5-6.5 inches.
5. ______________ The weight of pumpkins is considered to be a continuous variable.
II. For the following statements, tell whether descriptive or inferential statistics have been used.
6. _______________ The average life expectancy in New Zealand is 78.49 years. (Source: World Factbook 2004)
7. _______________ A diet high in fruits and vegetables will lower blood pressure. (Institute of Medicine)
8. _______________ The total amount of estimated losses from hurricane Hugo was $4.2 billion. (Insurance Service Office)
9. _______________ Researchers stated that the shape of a person’s ears is related to the person’s aggression. (American Journal of Human Biology)
10. ______________ In 2025, the number of high school graduates will be 3.2 million students. (National Center for education)
III. Classify each as nominal-level, ordinal-level, interval-level or ratio-level-data
11. ______________ Ratings of movies as G, PG, and R.
12. ______________ Number of candy bars sold on a fund drive.
13. ______________ Classification of cars as subcompact, compact, standard, and luxury.
14. ______________ Temperatures of hair dryers.
15. ______________ Weights of suitcases on a commercial airline.
IV. Give the boundaries for each value.
16. _______________ 48 seconds
17. _______________ .56 centimeter
18. _______________ 9.1 quarts
9. _______________ 13.7 pounds
20. _______________ 7 feet
V. Classify each as random, systematic, stratified or cluster
21. _______________ To conduct a pre-election opinion poll on a proposed amendment to the state constitution, a random sample of 10 telephone prefixes (first three digits of the phone number) was selected and all households from the phone prefixes selected were called
22. _______________ To maintain quality control in a brewery, every 20th bottle of beer coming off the production line was opened and tested.
23. _______________ Subscribers to the magazine Sound Alive were assigned numbers. Then a sample of 30 subscribers was selected by using a random-number table. The subscriber in the sample were invited to rate new compact disc player for a “What the Subscribers Think” column
24. ________________ To judge the appeal of a proposed television sitcom, a random sample of 10 people from each of three different age categories was selected and those chosen were asked to rate a pilot show.
25. ________________ To evaluate the differences in employee benefits, you select a sample of businesses using the Island Business Directory. Select a random starting place and then use every 50th business listed until you have 100 businesses.
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