True or False: In a single-blind experiment, only the experimenter does not know which treatment the participants received.

False - In a single blind, only the participants are unaware of the treatment.

False - In a single blind experiment, neither the participant nor the experimenter know the treatment.

An advertising agency is testing the effectiveness of a new commercial. They are trying out the commercial in three different time lengths (15, 30, and 60 seconds) and two formats (animated vs. live action). Each test audience will rate the product after seeing the commercial shown in one way. Which description is correct?

An experiment with 2 factors (length and format), one having 3 levels (15, 30, 60) and the other having 2 levels (animated and live) for 6 treatments.

An experiment with 2 factors (length and format) at 5 levels (15, 30, 60, animated and live) for 5 treatments.

An experiment with 1 factor (length) blocked by format with 3 levels (15, 30, 60).

A sample survey with two questions and one response.

A sample stratified by length and format.

Which is one of the main differences between experiments and observational studies?

An experiment can be used to establish a causal relationship, but an observational study cannot.

There is a response variable in an experiment, but not in an observational study.

There is at least one explanatory variable in an experiment, but not in an observational study.

An experiment requires blocking, while an observational study does not.

Observational studies require larger samples than experiments.

In one study, researchers at McGill University recruited 127 people with high cholesterol and randomly split them into two groups. One took a probiotic supplement twice a day for nine weeks, while the second group took a placebo. The probiotic group saw their total cholesterol drop by 9 percent. In a different study, conducted in Britain, 80 volunteers were given probiotics for six weeks and then switched, later on, to a placebo - or vice versa (chosen at random). That study found no difference in cholesterol levels when the subjects took the supplement versus the placebo.

The McGill study is a completely randomized experiment, while the British study is a matched pairs experiment.

The McGill study is a controlled randomized experiment, while the British study is a matched pairs experiment.

The results from the McGill study are more valid because it includes blinding while the British study does not.

We have reason to believe that the design of one of these experiments was flawed since the results are contradictory.

Conclusions from the British study can not be trusted since there is no control group.

Statistics teachers often debate the best order in which to teach topics. One group of teachers likes to teach design of studies first. Another group likes to begin with data analysis. To see which order is more effective in preparing students for the AP Exam, an experiment was proposed. A large group of teachers, each of whom teaches two sections of statistics, volunteered to be part of the experiment. Each teacher will randomly assign one of their classes to beign with design, and the other to begin with data analysis. Which is the correct description of this design?

The experimental units are the classrooms, the blocks are the teachers, and the response variable is the difference in average AP Exam score for each of the teacher's classes.

The experimental units are the teachers, there are no blocks, and the response variable is the average AP Exam score for each teacher.

The experimental units are the individual students, the blocks are the classrooms, and the response variable is each individual student's AP Exam score.

The experimental units are the individual students, the blocks are the teachers, and the response variable is the average AP Exam score for each classroom

The experimental units are the order of the topics, the blocks are the teachers, and the response variable is the average AP Exam score for all students who used each order of topics.

A market research company wishes to find out whether the population of students at a university prefers Starbucks or Dunkin Donuts. A random sample of students is selected, and each student is asked first to try both but the order they try them is randomly decided with a coin toss (heads: Starbucks, then Dunkin. tails: vice versa). They then indicate which brand they prefer. This is an example of

a completely randomized experiment

Identify the design for the experiment

completely randomized, the factor is pesticide

randomized block, blocked on tree type, the factor is pesticide

This experiment is single blind, blocked by pesticide

The experiment is double blind, the factors are tree type and pesticide

In order to perform an experiment using 60 members of a gym, I first divide the list of members into men and women because I feel that the results will be different based on gender. I then randomly choose 30 men and 30 women. I assign half of the men to the treatment group and half to the control group. I repeat this procedure with the women. This is an example of a:

double blind simple random sample

Prob Stats Unit 1&2 Review

Authored by Chloe Hennon

Mathematics

9th - 12th Grade

CCSS covered

Used 7+ times

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31 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a population?

A tool used to collect statistical data

Statistics collected from an entire population

All the people or objects on which data is collected

A group chosen from a population

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a census?

A tool used to collect statistical data

Statistics collected from an entire population

The factual information collected from a survey or other source

A group chosen from a population

Tags

CCSS.6.SP.B.5A

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a survey?

process of collecting statistical data from a small group of a population

Statistics collected from an entire population

An element or feature that can vary

A person chosen from a population

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is statistics?

The science of collecting and analysing data

Statistics collected from an entire population

An element or feature that can vary

A group chosen from a population

Tags

CCSS.6.SP.B.5B

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is data?

The practise of collecting and analysing data

The factual information collected from a survey or other source

An element or feature that can vary

A group chosen from a population

Tags

CCSS.6.SP.B.5B

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a sample?

A tool used to collect statistical data

Statistics collected from an entire population

The factual information collected from a survey or other source

A subgroup chosen from a population

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Questioning students as they leave a university library, a researcher asks 358 students about their drinking habits.
This is what type of sample?

cluster

convenience

systematic

stratified

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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Prob Stats Unit 1&2 Review

What is a population?

What is a census?

What is a survey?

What is statistics?

What is data?

What is a sample?

Questioning students as they leave a university library, a researcher asks 358 students about their drinking habits.
This is what type of sample?

Chosen at random, 580 customers at a car dealership are contacted and asked their opinions of the service they received.
This is what type of sample?

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys, so she randomly selects five students from the class to survey, paying no attention to their gender.
This is a form of:

A/an __________________ is a fake treatment given to the Control Group so that its members can't figure out that they're in the Control Group.

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Mathematics

Prob Stats Unit 1&2 Review

What is a population?

What is a census?

What is a survey?

What is statistics?

What is data?

What is a sample?

Questioning students as they leave a university library, a researcher asks 358 students about their drinking habits.This is what type of sample?

Chosen at random, 580 customers at a car dealership are contacted and asked their opinions of the service they received.This is what type of sample?

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys, so she randomly selects five students from the class to survey, paying no attention to their gender.This is a form of:

A/an __________________ is a fake treatment given to the Control Group so that its members can't figure out that they're in the Control Group.

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Mathematics

Questioning students as they leave a university library, a researcher asks 358 students about their drinking habits.
This is what type of sample?

Chosen at random, 580 customers at a car dealership are contacted and asked their opinions of the service they received.
This is what type of sample?

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys, so she randomly selects five students from the class to survey, paying no attention to their gender.
This is a form of: