Why do we randomly select our samples?

so we don't get the same answers from everyone

to eliminate confounding results

A school randomly chose ten English teachers and asked them which type of juice their students would prefer. Which reason best shows why this sample is biased?

The sample didn't include students.

The sample can only be accurate if each teacher is included in the sample

The choir director in a high school wants to know how the students in the school feel about singing. If the director selects 100 girls and 100 boys to complete a survey, which method will result in a biased sample?

The students will be selected from the choir

The students will be selected randomly throughout the school

The students will be selected on Wednesday afternoon before the choir concert

The choir director will select five students from each of the forty homerooms in the school

A marketing research firm wished to determine if the adult men in Laramie, Wyoming, would be interested in a new upscale men's clothing store. From a list of all residential addresses in Laramie, the first selects a simple random sample of 100 and mails a brief questionnaire to each. The population of interest is

all residential addresses in Laramie, WY

the members of the marking firm conducting the survey

the 100 addresses to which the survey was mailed

In order to assess the opinion of students at the University of Minnesota on campus snow removal, a reporter for the student newspaper interviews the first 12 students he meets who are willing to express their opinion. In this case, the sample is

all those students favoring prompt snow removal.

all students at universities receiving substantial snow.

all students at the University of Minnesota.

A study of human development showed two types of movies to groups of children. Crackers were available in a bowl, and the investigators compared the number of crackers eaten by children watching the different kinds of movies. One kind of movie was shown at 8 AM (right after the children had breakfast) and another at 11 AM (right before the children had lunch). It was found that during the movie shown at 11 AM, more crackers were eaten than during the movie shown at 8 AM. The investigators concluded that the different types of movies had an effect on appetite. The results cannot be trusted because

the time the movie was shown is a confounding variable.

the study was not double-blind. Neither the investigators nor the children should have been aware of which movie was being shown.

the investigators were biased. They knew beforehand what they hoped the study would show.

the investigators should have used several bowls, with crackers randomly placed in each.

Select the true statements.

In an experiment, one variable is manipulated and the responses are measured.

In an observational study, no variables are manipulated however at least one variable is measured.

Observational studies and experiments are both used to gather data and draw conclusions.

In an experiment, who are the "subjects"?

The individuals taking part in the experiment.

The people conducting the experiment.

The people funding the experiment.

Medical experiments, such as one to compare aspirin with a placebo for preventing heart attacks, are often double blind. This means that...

neither the subject nor the doctors know which treatment the patient received.

subjects choose which treatment they get, but do not tell the doctors.

all individual data are kept confidential.

subjects are told either their treatment or their medical condition.

A study compares the effect on college students of two different TV advertisements for spring break in Gulf Shores, Alabama. Call the ads "Ad #1" and "Ad #2". We want to know which ad makes more students want to visit Gulf Shores during spring break. The subjects are 90 students taking a course in hotel management. The design of the study looks like the picture above. A weakness of this study is...

Because the students all come from one course, the findings may not extend to all college students.

This is an observational study, so we can't conclude that the ad viewed causes the response.

The double-blind technique was not used.

Two variables in a study are said to be confounding if...

you cannot separate their effects on the response variable

if one cause and increase in the other

Ch 10-11 Quiz Review: Samples and Experimental Design

12th Grade

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45 Qs

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Ch 10-11 Quiz Review: Samples and Experimental Design

Quiz

•

Mathematics

•

12th Grade

•

Practice Problem

•

Medium

•

CCSS

HSS.IC.B.3, HSS.IC.A.1, 7.SP.A.1

Standards-aligned

Justin Kaufman

Used 3+ times

FREE Resource

45 questions

Show all answers

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

_______ is the entire group of objects or individuals considered for a survey.

Sample

Population

Random Sample

Quartile

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The manager of a bookstore surveys people who buy mystery novels to see if the store should expand its hours. What is the population?

People who visit the bookstore.

People who buy mystery novels.

Residents of the town

People who like to read.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A music store gives comment cards to all members of its Jazz Club to find out about satisfaction with the club's features. Identify the sample.

People who play instruments.

All music store customers except Jazz Club members.

All music store customers

Jazz Club members

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Identify which type of sampling method is described:
Each member of the population has an equal chance of being selected and a random sample is more likely to be representative of a population than samples that are chosen in other ways.

Random

Systematic

Convenience

Self-selected

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A student surveys mathematics teachers to get their opinion on teaching. What is the sample?

All teachers in the world.

All teachers within the school.

All mathematics teachers in the school.

All teachers except mathematics teachers.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Unbiased sampling is:

when you choose the group you think will represent the sample

when any member of the population is equally likely to be chosen for the sample

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Biased sampling is

when you choose a population that is more likely to give you the result you want

when you choose a group that is equally likely to be chosen

Tags

CCSS.7.SP.A.1

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Ch 10-11 Quiz Review: Samples and Experimental Design

45 questions

_______ is the entire group of objects or individuals considered for a survey.

The manager of a bookstore surveys people who buy mystery novels to see if the store should expand its hours. What is the population?

A music store gives comment cards to all members of its Jazz Club to find out about satisfaction with the club's features. Identify the sample.

Identify which type of sampling method is described:
Each member of the population has an equal chance of being selected and a random sample is more likely to be representative of a population than samples that are chosen in other ways.

A student surveys mathematics teachers to get their opinion on teaching. What is the sample?

Unbiased sampling is:

Biased sampling is

Mrs. Trahan samples her class by selecting every third person on her class list. Which type of sampling method is this?

Mrs. Trahan samples her class by selecting every third person on her class list. Which type of sampling method is this?

Mrs. Trahan samples her class by selecting all students sitting at group 1 and group 5 in her classroom. This sampling technique is called?

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Mathematics

Ch 10-11 Quiz Review: Samples and Experimental Design

45 questions

_______ is the entire group of objects or individuals considered for a survey.

The manager of a bookstore surveys people who buy mystery novels to see if the store should expand its hours. What is the population?

A music store gives comment cards to all members of its Jazz Club to find out about satisfaction with the club's features. Identify the sample.

Identify which type of sampling method is described:Each member of the population has an equal chance of being selected and a random sample is more likely to be representative of a population than samples that are chosen in other ways.

A student surveys mathematics teachers to get their opinion on teaching. What is the sample?

Unbiased sampling is:

Biased sampling is

Mrs. Trahan samples her class by selecting every third person on her class list. Which type of sampling method is this?

Mrs. Trahan samples her class by selecting every third person on her class list. Which type of sampling method is this?

Mrs. Trahan samples her class by selecting all students sitting at group 1 and group 5 in her classroom. This sampling technique is called?

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Mathematics

Identify which type of sampling method is described:
Each member of the population has an equal chance of being selected and a random sample is more likely to be representative of a population than samples that are chosen in other ways.