AMDM Unit 4 Test Fall 2024

A group of students is interested in knowing if there is a correlation between attending an SAT Prep class and scores achieved on the SAT Examination. The students use a survey to collect their data from both students who took an SAT Prep class and those that did not take an SAT Prep class. This is an example of:

• Experiment

• Controlled Experiment

• Observational Study

• Survey

A group of students is interested in knowing if there is a correlation between the amount of sleep kids get and their performance on the SAT. They have 20 kids sleep for 5 hours, 20 kids sleep for 6 hours, 20 kids sleep for 7 hours, and 20 kids sleep for 8 hours. They get their SAT scores and analyze the data.

• Experiment

• Sample

• Observational Study

• Survey

What is the placebo effect?

• A psychological phenomenon in which a person experiences a change in their condition due to the belief that a treatment will be effective, even if the treatment has no actual therapeutic effect.

• A physiological response to a medication or treatment that is independent of the medication's or treatment's active ingredients.

• A statistical bias that occurs when researchers' expectations influence the results of a study.

• A type of experimental design in which neither the participants nor the researchers know who is receiving the treatment and who is receiving a placebo.

What are the two groups that you have with an experimental study?

• Independent variable and dependent variable

• Sample group and population group

• Treatment group and control group

• Treatment group and Experiment group

What is the difference between a control group and a treatment group?

Find the Mode and the “Five Number Summary” (Min, Q1, Median, Q3, Max) for the following IQ scores of 7th graders: 87, 95, 93, 95, 110, 110, 126, 81, 93, 97, 97, 110, 110, 115, 118, 119, 121, 129, 130, 98, 90, 108, 107, 110, 110

Create a box and whisker plot for the above data points.

The middle 50% of the scores lie between what numbers?

Two candidates are running for the senate. The latest poll shows that Candidate A has 47% of the vote and Candidate B has 44% of the vote. The poll has a 3.7% margin of error. What is the true population interval for each candidate?

A recent Gallup poll interviewed 950 adults to find out if they are participating in sports or exercise activities. What is the margin of error?

• .032

• 3.2

• 4.8

• .048