Which is not a method of random selection?

Randomly pointing to numbers on a page

Using a random number generator

To check the effect of hot temperatures on the elasticity of two brands of rubber bands, one box of Brand A and one box of Brand B rubber bands are tested. Ten bands from the Brand A box are placed in a warm car in the sun for two hours and ten bands from the Brand B box are kept at room temperature. The amount of stretch before the breakage is measured on each rubber band, and the mean for the hot bands is compared to the mean for the others. Is this a good experimental design?

No, because temperature is confounded with brand.

No, because the means are not proper statistics for comparison.

No, because more than two brands should be used.

No, because more temperatures should be used.

A reading specialist in a large public school system believes that the more time students spend reading, the better they will do in school. She plans a middle school experiment in which an SRS of 30 eighth graders will be assigned four extra hours of reading per week, and SRS of 30 seventh graders will be assigned two extra hours or reading per week, and an SRS of 30 sixth graders with no extra assigned reading will be a control group. After one school year, the mean GPAs from each group will be compared. Is this a good experimental design?

No, because grade level is a lurking variable which may well be confounded with the variables under consideration.

No, because while this design may point out an association between reading and GPA, it cannot establish a cause-and-effect relationship.

No, because without blinding, there is a strong chance of a placebo effect.

No, because any conclusion would be flawed because of blocking bias.

Unit 3 Review: Sampling, bias, and experimental design.

Authored by Cortni Gonzalez

Mathematics

10th - 12th Grade

CCSS covered

Used 230+ times

Unit 3 Review: Sampling, bias, and experimental design.

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20 questions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

Source of bias in which people CHOOSE to respond and usually only people with very strong opinions respond

Response Bias

Undercoverage

Convenience Sampling

Voluntary Response

Tags

CCSS.RL.11-12.6

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Source of bias in which some groups of populations are LEFT OUT of the selection process

Response Bias

Undercoverage

Convenience Sampling

Voluntary Response

Tags

CCSS.7.SP.A.1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Source of bias that occurs when you ask people who are EASY to ask

Response Bias

Convenience Sampling

Nonresponse

Voluntary Response

Tags

CCSS.RL.11-12.6

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Marianne wanted to know students' opinion on the new schedule at school. She places students' names in a container and randomly picks out 20 names.

Convenience Sampling

Systematic Random Sampling

Simple Random Sampling

Volunteer response

Tags

CCSS.HSS.IC.B.3

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Why do we randomly select our samples?

for control

reduce bias

so we don't get the same answers from everyone

to eliminate confounding results

Tags

CCSS.HSS.IC.B.3

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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

SRS

Stratified

Systematic

Cluster

Tags

CCSS.HSS.IC.B.3

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

At a middle school, the 7th graders will conduct a survey for where to go on a field trip. Which method will result in the least biased decision?

to randomly ask 8th grade students who went on a field trip last year

to randomly choose some 7th grade students to select a location

to ask all 7th grade teachers and administrators for a location

to ask the student council to choose a location

Tags

CCSS.HSS.IC.B.3

CCSS.HSS.IC.A.1

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Unit 3 Review: Sampling, bias, and experimental design.

Source of bias in which people CHOOSE to respond and usually only people with very strong opinions respond

Source of bias in which some groups of populations are LEFT OUT of the selection process

Source of bias that occurs when you ask people who are EASY to ask

Marianne wanted to know students' opinion on the new schedule at school. She places students' names in a container and randomly picks out 20 names.

Why do we randomly select our samples?

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

At a middle school, the 7th graders will conduct a survey for where to go on a field trip. Which method will result in the least biased decision?

Each student in the school is given a different number. A student is randomly selected from the first 25. That student and every 25^th student thereafter are in the sample. This is what type of sampling design?

An SRS of 25 students is taken from each grade to form the sample. This is what type of sampling design?

Starting at 8:00 Monday morning the first 50 students entering the front doors are selected to be in the sample. This is what type of sampling design?

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Similar Resources on Wayground

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Discover more resources for Mathematics

Unit 3 Review: Sampling, bias, and experimental design.

Source of bias in which people CHOOSE to respond and usually only people with very strong opinions respond

Source of bias in which some groups of populations are LEFT OUT of the selection process

Source of bias that occurs when you ask people who are EASY to ask

Marianne wanted to know students' opinion on the new schedule at school. She places students' names in a container and randomly picks out 20 names.

Why do we randomly select our samples?

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

At a middle school, the 7th graders will conduct a survey for where to go on a field trip. Which method will result in the least biased decision?

Each student in the school is given a different number. A student is randomly selected from the first 25. That student and every 25th student thereafter are in the sample. This is what type of sampling design?

An SRS of 25 students is taken from each grade to form the sample. This is what type of sampling design?

Starting at 8:00 Monday morning the first 50 students entering the front doors are selected to be in the sample. This is what type of sampling design?

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Mathematics

Each student in the school is given a different number. A student is randomly selected from the first 25. That student and every 25^th student thereafter are in the sample. This is what type of sampling design?