Hypothesis Testing and Effect Size Analysis in Psychological Research
An individual assignment focused on hypothesis testing and effect size analysis in PSY 415.
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Hypothesis Testing and Effect Size Analysis in Psychological Research
INDIVIDUAL ASSIGNMENT: WEEK THREE
The focus of this assignment is on the Five-Step Hypothesis Testing Process. In hypothesis
testing we are always making comparisons. We’ll be looking at two different kinds of
comparisons. Both of these comparisons use z tests.In real life, this type of research is very
rare but it’s a good starting place for us to learn some basic concepts. This assignment has
3 parts to it.
In Part One, we’re using the Five-Step Hypothesis Testing Process to compare an individual
to a population. How would we know if an individual is like the general population on
some specific variable or not? In the scenarios we’re using, we know that population mean
and standard deviation so we’re just comparing this one person’s score to the population’s
mean as the Comparison Distribution.
In Part Two, we’re using the Five-Step Hypothesis Testing Process to compare a sample of
people to a population. Is this sample of people different on some variable from the
general population or not? Since we’re comparing a sample of people to a population, we
have to use that sample’s mean and we use the Distribution of Means as a Comparison
Distribution.
In Part Three, we’re looking at a concept called Effect Size.
For Parts One and Two, I’m going to first give you an example and walk you through the
process and then I’m going to give you one to do on your own. You will need the Major
Formulas Handout that I told you to print out the first day of class. You will need to
reference our textbook.
Part One
Lottery Winner Example
(from text)
A study is done in which a randomly selected person is given $10 million. This person's
happiness, measured 6 months later, is 80. It is known in advance that happiness in the
general population is normally distributed with = 70 and
= 10. Could this result have
occurred by chance?
Restate question as a research hypothesis and a null hypothesis about the
populations.
Research hypothesis: There will be a statistically significant difference between the
happiness ratings on a self-report scale of this lottery winner six
months after winning the lottery when compared to the happiness
ratings of the general population. (μ1>μ2)
Null hypothesis: There will not be a statistically significant difference between the
happiness ratings on a self-report scale of this lottery winner six
months after winning the lottery when compared to the happiness
ratings of the general population. (μ1≤μ2)
INDIVIDUAL ASSIGNMENT: WEEK THREE
The focus of this assignment is on the Five-Step Hypothesis Testing Process. In hypothesis
testing we are always making comparisons. We’ll be looking at two different kinds of
comparisons. Both of these comparisons use z tests.In real life, this type of research is very
rare but it’s a good starting place for us to learn some basic concepts. This assignment has
3 parts to it.
In Part One, we’re using the Five-Step Hypothesis Testing Process to compare an individual
to a population. How would we know if an individual is like the general population on
some specific variable or not? In the scenarios we’re using, we know that population mean
and standard deviation so we’re just comparing this one person’s score to the population’s
mean as the Comparison Distribution.
In Part Two, we’re using the Five-Step Hypothesis Testing Process to compare a sample of
people to a population. Is this sample of people different on some variable from the
general population or not? Since we’re comparing a sample of people to a population, we
have to use that sample’s mean and we use the Distribution of Means as a Comparison
Distribution.
In Part Three, we’re looking at a concept called Effect Size.
For Parts One and Two, I’m going to first give you an example and walk you through the
process and then I’m going to give you one to do on your own. You will need the Major
Formulas Handout that I told you to print out the first day of class. You will need to
reference our textbook.
Part One
Lottery Winner Example
(from text)
A study is done in which a randomly selected person is given $10 million. This person's
happiness, measured 6 months later, is 80. It is known in advance that happiness in the
general population is normally distributed with = 70 and
= 10. Could this result have
occurred by chance?
Restate question as a research hypothesis and a null hypothesis about the
populations.
Research hypothesis: There will be a statistically significant difference between the
happiness ratings on a self-report scale of this lottery winner six
months after winning the lottery when compared to the happiness
ratings of the general population. (μ1>μ2)
Null hypothesis: There will not be a statistically significant difference between the
happiness ratings on a self-report scale of this lottery winner six
months after winning the lottery when compared to the happiness
ratings of the general population. (μ1≤μ2)
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Document Details
University
Indiana Wesleyan University
Subject
Psychology