MAT135 | Statistics in Mathematics - Lackawanna university

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.

1. _______________ The average life expectancy in New Zealand is 78.49 years. (Source: World Factbook 2004)
2. _______________ A diet high in fruits and vegetables will lower blood pressure. (Institute of Medicine)
3. _______________ The total amount of estimated losses from hurricane Hugo was $4.2 billion. (Insurance Service Office)
4. _______________ Researchers stated that the shape of a person’s ears is related to the person’s aggression. (American Journal of Human Biology)
5. ______________ 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

1. ______________ Ratings of movies as G, PG, and R.
2. ______________ Number of candy bars sold on a fund drive.
3. ______________ Classification of cars as subcompact, compact, standard, and luxury.
4. ______________ Temperatures of hair dryers.
5. ______________ Weights of suitcases on a commercial airline.

IV. Give the boundaries for each value.

16. _______________ 48 seconds

1. _______________ .56 centimeter
2. _______________ 9.1 quarts
3. _______________ 13.7 pounds
4. _______________ 7 feet

V. Classify each as random, systematic, stratified or cluster

1. _______________ 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
2. _______________ To maintain quality control in a brewery, every 20th bottle of beer coming off the production line was opened and tested.
3. _______________ 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
4. ________________ 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.
5. ________________ 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.