Question 1

If you reject the null hypothesis when it is in fact true in the population, then what type of error have you made?

Accepted Answer

A) A Type I error 
B) A Type II error 
C) A calculation error 
D) All of the above 
A) A Type I error 
B) A Type II error 
C) A calculation error 
D) All of the above B

Question 2

If you have a score of 16 from a sample with a mean of 12 and a standard deviation of 2 then what would be the z-score?

Accepted Answer

A) -2 
B) -1 
C) 1 
D) 2 
A) -2 
B) -1 
C) 1 
D) 2 D

Question 3

describe populations whereas describe samples:

Accepted Answer

A) People, researchers 
B) Statistics, parameters 
C) Parameters, statistics 
D) Researchers, people 
A) People, researchers 
B) Statistics, parameters 
C) Parameters, statistics 
D) Researchers, people C

Question 4

If you have a probability of 3 in 15 what is this expressed as a percentage?

Accepted Answer

A) 3% 
B) 15% 
C) 20% 
D) 30% 
A) 3% 
B) 15% 
C) 20% 
D) 30%

Question 5

What type of distribution is represented in the following histogram?

Accepted Answer

A) A negatively skewed distribution 
B) A positively skewed distribution 
C) A bimodal distribution 
D) A normal distribution 
A) A negatively skewed distribution 
B) A positively skewed distribution 
C) A bimodal distribution 
D) A normal distribution

Question 6

Snowball sampling has which of the following characteristics?

Accepted Answer

A) Randomly selecting people from a population 
B) Relying on people to volunteer to participate 
C) Relying on referrals from people who have already taken part in a study 
D) None of the above 
A) Randomly selecting people from a population 
B) Relying on people to volunteer to participate 
C) Relying on referrals from people who have already taken part in a study 
D) None of the above

Question 7

Which of these has a probability of 0.167?

Accepted Answer

A) Rolling an even number on a die 
B) Rolling an odd number on a die 
C) Rolling a number greater than 4 on a die 
D) Rolling a 6 on a die 
A) Rolling an even number on a die 
B) Rolling an odd number on a die 
C) Rolling a number greater than 4 on a die 
D) Rolling a 6 on a die

Question 8

Which of the following make assumptions about the distributions in populations?

Accepted Answer

A) Inferential tests 
B) Parametric tests 
C) Non-parametric tests 
D) All of the above 
A) Inferential tests 
B) Parametric tests 
C) Non-parametric tests 
D) All of the above

Question 9

Which of the following involves random sampling?

Accepted Answer

A) Snowball sampling 
B) Volunteer sampling 
C) Opportunity sampling 
D) None of the above 
A) Snowball sampling 
B) Volunteer sampling 
C) Opportunity sampling 
D) None of the above

Question 10

Which of the following is a one-tailed hypothesis?

Accepted Answer

A) There will be a difference between smokers and non-smokers in breathlessness 
B) There will be a relationship between numbers of cigarettes smoked and degree of breathlessness 
C) As the number of cigarettes smoked increases, then so will rating of breathlessness 
D) None of the above 
A) There will be a difference between smokers and non-smokers in breathlessness 
B) There will be a relationship between numbers of cigarettes smoked and degree of breathlessness 
C) As the number of cigarettes smoked increases, then so will rating of breathlessness 
D) None of the above

Question 11

What happens to sampling error when you randomly select larger samples?

Accepted Answer

A) It increases 
B) It disappears altogether 
C) It decreases 
D) It becomes negligible 
A) It increases 
B) It disappears altogether 
C) It decreases 
D) It becomes negligible

Question 12

Statistical power can be defined as:

Accepted Answer

A) the strength of the effect that you observe in your research 
B) the ability of a study to reject a false null hypothesis 
C) the value of the p-value that you get from your inferential statistical test 
D) all of the above 
A) the strength of the effect that you observe in your research 
B) the ability of a study to reject a false null hypothesis 
C) the value of the p-value that you get from your inferential statistical test 
D) all of the above

If you reject the null hypothesis when it is in fact true in the population, then what type of error have you made?

If you have a score of 16 from a sample with a mean of 12 and a standard deviation of 2 then what would be the z-score?

describe populations whereas describe samples:

If you have a probability of 3 in 15 what is this expressed as a percentage?

What type of distribution is represented in the following histogram?

Snowball sampling has which of the following characteristics?

Which of these has a probability of 0.167?

Which of the following make assumptions about the distributions in populations?

Which of the following involves random sampling?

Which of the following is a one-tailed hypothesis?

What happens to sampling error when you randomly select larger samples?

Statistical power can be defined as:

An Introduction to the Research Process

Descriptive Statistics

Epidemiology

Introduction to Data Screening and Cleaning

Differences Between Two Groups

Differences Between Three or More Conditions

Testing Associations Between Categorical Variables

Measuring Agreement: Correlational Techniques

Linear Regression

Standard Multiple Regression

Logistic Regression

Interventions and Analysis of Change

Survival Analysis: an Introduction

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Exam 3: The Basis of Statistical Testing

If you reject the null hypothesis when it is in fact true in the population, then what type of error have you made?

If you have a score of 16 from a sample with a mean of 12 and a standard deviation of 2 then what would be the z-score?

describe populations whereas describe samples:

If you have a probability of 3 in 15 what is this expressed as a percentage?

What type of distribution is represented in the following histogram?

Snowball sampling has which of the following characteristics?

Which of these has a probability of 0.167?

Which of the following make assumptions about the distributions in populations?

Which of the following involves random sampling?

Which of the following is a one-tailed hypothesis?

What happens to sampling error when you randomly select larger samples?

Statistical power can be defined as:

An Introduction to the Research Process

Descriptive Statistics

Epidemiology

Introduction to Data Screening and Cleaning

Differences Between Two Groups

Differences Between Three or More Conditions

Testing Associations Between Categorical Variables

Measuring Agreement: Correlational Techniques

Linear Regression

Standard Multiple Regression

Logistic Regression

Interventions and Analysis of Change

Survival Analysis: an Introduction

Filters