Name:    Unit 01-01 -  Statistical Studies and Definitions

Multiple Choice
Identify the choice that best completes the statement or answers the question.

1.

What is the Sample?

 a. The 9,450 adults that said yes b. The 12,000 adults surveyed c. The adults in the United States d. The adults throughout the world

2.

 Identify the following data set: …. every single Y-Phone’s maximum volume is measured before being packaged at a manufacturing plant.
 a. Population b. Sample

3.

A traffic cop was stopping every 5th car to check for insurance and license.  What type of sampling method is the cop using?

 a. Simple Random Sampling c. Systematic Sampling b. Stratified Sampling d. Convenience Sampling

4.

Which type of sampling method is being employed in the following example:

“A study was being conducted after a tsunami.  The researcher was trying to assess the needs of the victims in a single downtown high rise apartment building .  So, she sent a messenger to ask one person on each floor what their needs were to get an idea of what was needed to support the people in the building.”

 a. Simple Random  Sampling d. Sampling of Convenience b. Stratified  Sampling e. Systematic  Sampling c. Cluster  Sampling

5.

Which would be considered Qualitative data?

 a. A list of the tire pressure for each tire of every car in a garage b. A list of the name brands for each tire of every car in a garage c. A list of tread depth measures for each tire of every car in a garage d. A list of the measure of the diameters for each tire of every car in a garage

6.

 A telephone company is trying to determine the most common injuries of a workman falling off a utility pole at least 25 feet up in the air to see if they can improve safety. What would most likely be the most appropriate type of study they should use?

 a. Perform an Experiment c. Take a Census b. Use a Simulation d. Use a Sampling

7.

 An elementary principal wants to determine if simply observing a teacher’s classroom once a week for an hour compared to no observations for the week improve student test results in the classroom.  So, he randomly selects 10 teachers to observe and 10 teachers not to observe and collects data on the students in those classrooms.  What type of study is the principal conducting?
 a. Perform an Experiment b. Observational study c. Take a Census d. A Simulation

8.

Which survey question has the least amount of bias?

 a. Why are vegetables good for you? b. How many hours of sleep do you get? c. Do you think the media has a negative role in politics? d. Why are teen drivers dangerous?

9.

 A teacher is conducting research for an administrator comparing graduation rate trends of their school, Riverside High School, with the states’ graduation rate trends over the last 5 years.  The teacher went to the board of education to retrieve the data collected by the district  for her school and was able to retrieved the states graduation rates on the Internet.Is the teacher using a Primary data source or Secondary data source and why?
 a. Primary Data source because the teacher collected the data herself. b. Primary Data source because the teacher is a teacher at the school that is being researched. c. Secondary Data source because the teacher should have collected more than 5 years worth of data. d. Secondary Data source because the teacher didn’t collect the data herself.

10.

 Collecting information of participants in a study with their documented willingness to have data about them shared in a study is also known as what?
 a. Altruism b. Informed Consent c. Confidential Sampling d. Hippocratic Oath

11.

 On which of the below situations has confidentiality NOT been broken?
 a. You made notes during an interview and you asked a coworker to proof read your notes. b. You store your encrypted  research files on a public cloud drive. c. You forget to inform participants that another researcher will be using the data collected about the participant. d. You ask participants to sign a consent form giving permission for their name be entered into a prize drawing. e. You introduce a couple of participants to each other in the same study.

12.

 A researcher believes that eating all organic foods will improve blood pressure. So, the researcher study groups as their diet is altered.How would you describe the change in blood pressure?
 a. Independent Variable(Treatment Variable) c. Confounding Variable b. Dependent Variable(Variable of Interest)

13.

 A person is studying the relationship between temperature and mental ability.  So, she devised a test in which a group of 10 mice are timed as they run through a maze which leads to food and water. The researcher repeats the test 3 times with each group to see how much they improve and she uses three groups.
•  Group ‘A’, does the test under normal room temperature of 76°F.
•  Group ‘B’, does the test in the cold at a temperature of 45°F.
•  Group ‘C’, does the test under a hot temperature of 105°F.

How would you most correctly describe Group ‘C’ in a statistical study?

 a. Control Group b. Placebo Group c. Treatment Group d. Regular Group

14.

Which type of study best describes the following research most likely to be done?

A researcher wants to test out a gasoline additive for tractor trailer trucks  that is suppose to substantially improve a truck’s  gas mileage.  So, the researcher has another independent  group send her 200 bottles with 100 being labeled ‘A’ that   just have diesel fuel and the other 100 being labeled ‘B’ with  the additive.  During the  study  neither the  researcher nor the truck drivers know which label means it has the additive or not. Then, the data is collected and only near the end of the study is it revealed to the researcher and drivers which bottles actually had the additive.

 a. Blind Study c. Open Study b. Double Blind Study