PSY 309 Exam 3 UPDATED ACTUAL
Questions and CORRECT Answers
The relationship between a statistic and a parameter is the same as the relationship between ____. -
CORRECT ANSWER - A sample and a population
Statistical methods that organize, summarize, or streamline data are called ____. - CORRECT
ANSWER - descriptive statistics
In a correlational study, ____. - CORRECT ANSWER - You have two variables and 1 group
In the simplest experimental study, ____. - CORRECT ANSWER - 1 variable two groups
Using letter grades (A, B, C, D, and E) to classify student performance on an exam is an example of
measurement on a(n) ____ scale of measurement. - CORRECT ANSWER - ordinal scale
After measuring two individuals, a researcher can say that Tom's score is four points higher than Bill's.
The measurements must come from a(n) ____ scale. - CORRECT ANSWER - Interval/Ratio scale
What is the value of Σ(X - 2 )2 for the following scores? Scores: 2, 3, 5 - CORRECT ANSWER -
10
What is the final step to be performed when computing Σ(X - 2)2? - CORRECT ANSWER - Sum
of the squared values
A recent study reports that elementary school students who were given a nutritious breakfast each
morning had higher test scores than students who did not receive the breakfast. For this study, what is the
independent variable? - CORRECT ANSWER - Whether or not the students get breakfast
, In an experiment comparing two methods for teaching social skill training to children with autism, the
independent variable is ____ and the dependent variable is ____. - CORRECT ANSWER - IV:
Teaching methods and DV: Social skills learned
A sample of n = 15 scores ranges from a high of X = 11 to a low of X = 3. If these scores are placed in a
frequency distribution table, how many X values will be listed in the first column of that table? -
CORRECT ANSWER - 9
For the following frequency distribution of quiz scores, how many individuals took the quiz?
Xf
56
45
35
23
1 2 - CORRECT ANSWER - n=21
For the following frequency distribution of exam scores, what is the lowest possible reported score on the
exam?
Xf
90-94 3
85-89 4
80-84 5
Questions and CORRECT Answers
The relationship between a statistic and a parameter is the same as the relationship between ____. -
CORRECT ANSWER - A sample and a population
Statistical methods that organize, summarize, or streamline data are called ____. - CORRECT
ANSWER - descriptive statistics
In a correlational study, ____. - CORRECT ANSWER - You have two variables and 1 group
In the simplest experimental study, ____. - CORRECT ANSWER - 1 variable two groups
Using letter grades (A, B, C, D, and E) to classify student performance on an exam is an example of
measurement on a(n) ____ scale of measurement. - CORRECT ANSWER - ordinal scale
After measuring two individuals, a researcher can say that Tom's score is four points higher than Bill's.
The measurements must come from a(n) ____ scale. - CORRECT ANSWER - Interval/Ratio scale
What is the value of Σ(X - 2 )2 for the following scores? Scores: 2, 3, 5 - CORRECT ANSWER -
10
What is the final step to be performed when computing Σ(X - 2)2? - CORRECT ANSWER - Sum
of the squared values
A recent study reports that elementary school students who were given a nutritious breakfast each
morning had higher test scores than students who did not receive the breakfast. For this study, what is the
independent variable? - CORRECT ANSWER - Whether or not the students get breakfast
, In an experiment comparing two methods for teaching social skill training to children with autism, the
independent variable is ____ and the dependent variable is ____. - CORRECT ANSWER - IV:
Teaching methods and DV: Social skills learned
A sample of n = 15 scores ranges from a high of X = 11 to a low of X = 3. If these scores are placed in a
frequency distribution table, how many X values will be listed in the first column of that table? -
CORRECT ANSWER - 9
For the following frequency distribution of quiz scores, how many individuals took the quiz?
Xf
56
45
35
23
1 2 - CORRECT ANSWER - n=21
For the following frequency distribution of exam scores, what is the lowest possible reported score on the
exam?
Xf
90-94 3
85-89 4
80-84 5
