A recent survey of 2625 elementary school children found that 28% of the children could be classified obese. What is the population?

2625 elementary school children

All elementary school children classified as obese

28% of elementary school children classified as obese

A recent survey of 2625 elementary school children found that 28% of the children could be classified obese. What is the sample?

2625 elementary school children

All elementary school children classified as obese

28% of elementary school children classified as obese

Which of the following is a key distinction between well designed experiments and observational studies?

An experiment can show a direct cause-and-effect relationship, whereas an observational study cannot.

More subjects are available for experiments than for observational studies.

Ethical constraints prevent large-scale observational studies.

Experiments are less costly to conduct than observational studies.

Tests of significance cannot be used on data collected from an observational study.

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, and sunlight. In this experiment the treatments would be....

The type of liquid that is given to the plants

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, and sunlight. In this experiment the response variable would be...

The type of liquid that is given to the plants

Each year, to measure income gaps (among other things) in the American population, The U.S. Census Bureau and U.S. Bureau of Labor Statistics conduct a sample called the current population survey. The findings in 2018 were that white households median annual income: $70,642 black households median annual income: $58,665 difference: $11,977 Can we infer cause and effect?

No, this is an observational study and observational studies do not impose treatments

Yes, this is a well-designed experiment

Yes, the survey imposed treatments

Ms. Springer is interested in seeing if household income has an effect on SAT scores of students. She studied 100 randomly selected students at North Myrtle Beach High School and gathered data on SAT scores and household income. Ms. Springer came to the conclusion that household income does has an effect on SAT scores. Can we generalize about the population of interest?

Yes, the students were randomly selected from the population

No, the students were not randomly selected from the population

Ms. Springer is interested in seeing if household income has an effect on SAT scores of students. She studied 100 randomly selected students at North Myrtle Beach High School and gathered data on SAT scores and household income. Ms. Springer came to the conclusion that household income does has an effect on SAT scores. Can we establish cause and effect? Explain

No. This is not a well-designed experiment, it is an observational study. Well-designed experiments randomly assign treatments that can establish cause and effect.

Yes. This is a well-designed experiment in which random assignment of treatments can establish cause and effect.

Ms. Springer is interested in seeing if traditional classroom instruction produces higher test scores in math courses than virtual online classes. She gives 50 Algebra 3 students a pretest. She then randomly divides them into two groups. One group does the course virtually and one group does traditional classroom setting for one term. At the end of the term she tests all the students again to compare their scores. is this an observational study or an experiment?

experiment because treatments were imposed upon the subjects

observational study because no treatment was imposed upon students

Ms. Springer is interested in seeing if traditional classroom instruction produces higher test scores in math courses than virtual online classes. She gives 50 Algebra 3 students a pretest. She then randomly divides them into two groups. One group does the course virtually and one group does traditional classroom setting for one term. At the end of the term she tests all the students again to compare their scores. Can we generalize about the population of interest?

No population was not randomly assigned

Yes population was randomly assigned to students

Ms. Springer is interested in seeing if traditional classroom instruction produces higher test scores in math courses than virtual online classes. She gives 50 Algebra 3 students a pretest. She then randomly divides them into two groups. One group does the course virtually and one group does traditional classroom setting for one term. At the end of the term she tests all the students again to compare their scores. Can we establish cause and eeffect?

Yes treatments were randomly assigned to subjects

No treatments were not randomly assigned to students. Students were already either virtual or in person

Lesson 19 AP Stat introduction to planning a study

Authored by Elizabeth Springer

Mathematics

11th Grade - University

CCSS covered

Used 7+ times

Lesson 19 AP Stat introduction to planning a study

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22 questions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

Observational study where data is studied on a sample of individuals

Observational study

Retrospective observational study

prospective observational study

survey

Tags

CCSS.HSS.IC.B.3

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Studies in which treatments are not imposed (forced)

Observational study

Retrospective observational study

prospective observational study

survey

Tags

CCSS.HSS.IC.B.3

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Observational study in which individuals are followed for future collecting of data

Observational study

Retrospective observational study

prospective observational study

survey

Tags

CCSS.HSS.IC.B.3

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Of the US adult population, 36% has an allergy. A sample of 1200 randomly selected adults resulted in 33.2% reporting an allergy. Who is the population?

1200 randomly selected US adults

36% of US adult population who has an allergy

All US adults

33.2% of randomly selected adults reporting an allergy

Tags

CCSS.HSS.IC.B.3

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Of the US adult population, 36% has an allergy. A sample of 1200 randomly selected adults resulted in 33.2% reporting an allergy. Who is the sample?

1200 randomly selected US adults

36% of US adult population who has an allergy

All US adults

33.2% of randomly selected adults reporting an allergy

Tags

CCSS.HSS.IC.B.3

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Select 90 students currently enrolled at North Carolina State University and ask how many years they’ve attended the university, how old they are, and if they live on campus.

What is the population?

All currently enrolled students at NCSU

All students that have attended NCSU

90 students selected that are currently enrolled at NCSU

90 randomly selected students in Raleigh, NC.

Tags

CCSS.HSS.IC.B.3

CCSS.HSS.IC.A.1

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Select 90 students currently enrolled at North Carolina State University and ask how many years they’ve attended the university, how old they are, and if they live on campus.

What is the sample?

All currently enrolled students at NCSU

All students that have attended NCSU

90 students selected that are currently enrolled at NCSU

90 randomly selected students in Raleigh, NC.

Tags

CCSS.HSS.IC.B.3

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

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Lesson 19 AP Stat introduction to planning a study

Observational study where data is studied on a sample of individuals

Studies in which treatments are not imposed (forced)

Observational study in which individuals are followed for future collecting of data

Of the US adult population, 36% has an allergy. A sample of 1200 randomly selected adults resulted in 33.2% reporting an allergy. Who is the population?

Of the US adult population, 36% has an allergy. A sample of 1200 randomly selected adults resulted in 33.2% reporting an allergy. Who is the sample?

Select 90 students currently enrolled at North Carolina State University and ask how many years they’ve attended the university, how old they are, and if they live on campus. What is the population?

Select 90 students currently enrolled at North Carolina State University and ask how many years they’ve attended the university, how old they are, and if they live on campus.What is the sample?

A recent survey of 2625 elementary school children found that 28% of the children could be classified obese. What is the population?

A recent survey of 2625 elementary school children found that 28% of the children could be classified obese. What is the sample?

a controlled study in which the researcher attempts to understand cause-and-effect relationships by assigning subjects to groups and deciding which treatments each group receives

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Select 90 students currently enrolled at North Carolina State University and ask how many years they’ve attended the university, how old they are, and if they live on campus.

What is the population?

Select 90 students currently enrolled at North Carolina State University and ask how many years they’ve attended the university, how old they are, and if they live on campus.

What is the sample?