Unit 4 Test Review (Collecting Data)

Match the following:

• Study of an entire group

• Population

• Collects data from an entire group

• Census

• A subset of indidiuals from a group

• Sample

Match the following

• Members who cannot be chosen

• Undercoverage

• Members can't be contacted or refuse

• Nonresponse

• Indivudals that share characteristics

• Cluster Sample

• Individuals located near each other

• Stratified Sample

A ​ (a)   is a study that collects data from a sample. ​ (b)   selects individuals from a population who are easy to reach. The design shows ​ (c)   if it is very likely to underestimate or overestimate the desired information. ​ (d)   allows people in the sample to respond via a general invitation. If every group of people in a population has an equal chance to be selected, this is called a ​ (e)   or SRS for short.

• Sample Survey
• Convenience Sampling
• Bias
• Volunatry Response Sampling
• Simple Random Sample

A(n)​ (a)   observes individuals but does not attempt to influence their response. A​ (b)   measure the out come of a study, while the ​ (c)   may help predict or explain changes in the response. An ​ (d)   deliberately imposes a treatment to measure the response.

• Observational Study
• Response Variable
• Explanatory Variable
• Experiment

In an experiment, a ​ (a)   is used to provide a baseline on the effects of a treatment and alleviate the ​ (b)   from taking place. When the subject is unaware of the treatment, this is called ​ (c)   and when both subject and the researcher do not know the treatment, this is called ​ (d)  

• Control Group
• Placebo Effect
• Single-Blind
• Double-Blind

A school is pondering starting the school day earlier. The assistant principal comes up with a survey to ask students if they support the change to an earlier time. She then waits at the school entrance and asks the first 30 students who show up to school.

What type of sampling is this?

• Convenience Sample

• Stratified Random Sample

• Cluster Sample

• Simple Ransom Sample (SRS)

A school is pondering starting the school day earlier. The assistant principal comes up with a survey to ask students if they support the change to an earlier time. She then waits at the school entrance and asks the first 30 students who show up to school.

Should the school trust the results of the survey?

• No, because the first students to the school will not be affected by an earlier start time.

• Yes, because she asked a sample of students.

• Yes, because a random sample is not necessary.

• No, because the assistant principal did a survey and not an experiment.

A small boutique owner ships her own products when ordered online. Recently, she bought two printers, Printer A and Printer B, to help with the process. She then uses Printer A for 30 labels and then Printer B for 30 labels, then compares the results.

• Which printer sells more products?

• Which printer expediates the shipping process?

• What printer is the cheapest?

• Which printer sounds the best?

A medical doctor is trying to determine which medical cream helps her patients recover from burns the best. She recruits the next 60 people, and separates them into three groups 1, 2, and 3. Then she assigns group 1 cream A, group 2 cream B, and group 3 cream C. She then measures the results at the end of the study.

What are the treatments in this experiment?

• All patients with burns.

• The 60 patients in the experiment.

• The three groups of patients.

• The three different creams.

A medical doctor is trying to determine which medical cream helps her patients recover from burns the best. She recruits the next 60 people, and separates them into three groups 1, 2, and 3. Then she assigns group 1 cream A, group 2 cream B, and group 3 cream C. She then measures the results at the end of the study.

What type of experimental design was used?

• Matched Pairs Design

• Randomized Block Design

• Randomized Design

• Cluster Randomized Design