Unit 3 Frappy Ap Stat Answers
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Unit 3 of the Advanced Placement Statistics course covers experimental design and data analysis. One of the key components of this unit is the Frappy (Free Response AP Problems) questions, which are designed to test students’ understanding of the concepts taught in class. In this article, we will provide answers to some of the Frappy questions from Unit 3 and explain the reasoning behind them.
Question 1:
A researcher is conducting an experiment to test the effectiveness of a new drug in lowering blood pressure. The researcher recruits 100 participants and randomly assigns them to two groups: a control group that receives a placebo and a treatment group that receives the new drug. After four weeks, the researcher measures the participants’ blood pressure levels and compares the results between the two groups.
a) Identify the response variable in this experiment.
Answer: The response variable is the participants’ blood pressure levels.
b) What is the explanatory variable in this experiment?
Answer: The explanatory variable is the type of treatment (placebo or the new drug).
c) What is the treatment group in this experiment?
Answer: The treatment group is the group of participants who receive the new drug.
d) What is the control group in this experiment?
Answer: The control group is the group of participants who receive the placebo.
Question 2:
A survey is conducted to determine the favorite type of ice cream among high school students. A random sample of 500 students is selected, and each student is asked to choose their favorite flavor from a list of five options: vanilla, chocolate, strawberry, mint chocolate chip, and cookie dough.
a) Identify the population in this survey.
Answer: The population is all high school students.
b) What is the sample in this survey?
Answer: The sample is the 500 students who were selected to participate in the survey.
c) What is the parameter of interest in this survey?
Answer: The parameter of interest is the proportion of high school students who prefer each flavor of ice cream.
d) What type of sampling method was used in this survey?
Answer: A simple random sampling method was used in this survey, as each student had an equal chance of being selected.
Question 3:
An environmental group is conducting a study to assess the impact of air pollution on respiratory health. The group collects data on the levels of air pollution in various cities and the number of hospital admissions for respiratory issues in those cities. The data is analyzed to determine if there is a significant correlation between air pollution levels and respiratory health problems.
a) What type of study is this?
Answer: This is an observational study, as the researchers are collecting data without intervening or controlling any variables.
b) What is the response variable in this study?
Answer: The response variable is the number of hospital admissions for respiratory issues.
c) What is the explanatory variable in this study?
Answer: The explanatory variable is the levels of air pollution in the cities.
d) What potential confounding variables should be considered in this study?
Answer: Factors such as age, gender, smoking habits, and pre-existing health conditions could be confounding variables that may also affect respiratory health.
In conclusion, Unit 3 of the AP Statistics course covers experimental design and data analysis, and the Frappy questions are designed to test students’ understanding of these concepts. By providing answers to the Frappy questions from Unit 3 and explaining the reasoning behind them, students can better prepare for the AP exam and improve their knowledge of statistics.
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