Algebra 2B Unit 7 Review - Statistical Studies and Randomization

Your teacher is trying to find the best way to teach fractions, and so they teach half the class using a traditional method and the other half of the class using hand-held fraction representations. The teacher will give the same exit question to each student in the class and will consider the results. Is this an observational study, an experiment, or a survey?

• observational study

• experiment

• survey

Tags

CCSS.HSS.IC.B.3

A student wants to research whether the ice at her local coffee shop is clean and free from impurities. The coffee shop typically sells about 300 iced coffees each day, and has 8 different varieties. The student decides to test 15 ice samples from randomly selected coffee drinks at various times in the day. Determine whether her sample is an appropriate, random sample and a good representation of the population.

• No, her sample is not an appropriate, random sample. It does not represent the whole population.

• Yes, her sample is an appropriate, random sample. It is a good representation of the population.

Tags

CCSS.HSS.IC.B.3

For the upcoming school year, Jordan Elementary School is deciding between the amusement park, science museum, or art museum for their school field trip. The school sent out a survey to the homes of 40 randomly selected students who participated in the school's science fair. Is it reasonable to use the results of this survey to decide where the field trip should be?

• Yes, because 40 students were surveyed.

• Yes, because this is a random sample.

• No, because not all students are surveyed.

• No, because the sample is biased toward students who are interested in science.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Which of the following is an example of a loaded question?

Question #1: Which candidate do you support for city council?
Question #2: What is your favorite candy flavor?
Question #3: Do you prefer light hearted comedies or less entertaining documentaries?

• Question #1

• Question #2

• Question #3

• All of the questions are loaded.

Tags

CCSS.RI. 9-10.8

CCSS.RI.11-12.5

CCSS.RI.11-12.8

CCSS.RI.8.5

CCSS.RI.9-10.5

An in-person survey was given to students at the end of a semester course to determine their satisfaction with the instructor. The instructor randomly selected students and included all genders, races, religions and grade in the course. The instructor asked students to rate their satisfaction of the course in a one-on-one interview. What type of bias, if any, was exhibited in the survey?

• There was no bias, as the participants were randomly selected.

• question order bias

• selection bias

• response bias

Tags

CCSS.HSS.IC.B.3

In addition to random sampling and adequate sample size, what else must be considered when deciding if the results of a survey can be generalized to a larger population? Select all that apply.

• participant height

• question order bias

• leading question bias

• survey repetition

• appropriate control and treatment groups

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Which of the following questions would best be answered by an experiment?

Question #1: Does reducing screen exposure two hours before bedtime decrease the time it takes to fall asleep?

Question #2: Do people in their 20s fall asleep faster than people in their 30s?

Question #3: What is the average time it takes for an individual to fall asleep?

• Question #1

• Question #2

• Question #3

• None of these questions are best answered by an experiment

Tags

CCSS.HSS.IC.B.3

Hiya wants to study the effect of diet on the activity level of dogs. Which population will allow for an appropriately randomized experiment?

Population #1: golden retrievers in Omaha, Nebraska

Population #2: dogs in California

Population #3: poodles in the United States

• Population #1

• Population #2

• Population #3

• None of these populations would allow for an appropriately randomized experiment

Tags

CCSS.HSS.IC.B.3

A researcher is interested in studying the effects of a new natural sleeping aid on children ages 5–10. She will randomly assign half of the participants to take the sleeping aid an hour before their bedtime, while the other half will not take the sleeping aid. She will have parents record the number of hours their child slept each night over the course of four months. Which of the following is the dependent variable in this study?

• The age of the children

• The type of sleeping aid used

• The amount, in mg, of the sleeping aid

• The number of hours each child slept

Tags

CCSS.HSS.IC.B.3

Complete the sentence to indicate which type of study design can determine a cause-and-effect relationship.

Answer: A(n) ​​ (a)   can be used to determine a cause-and-effect relationship.

• observational study
• survey
• experimental study

Tags

CCSS.HSS.IC.B.3