PSY 230 Midterm Review ACTUAL
UPDATED Exam Questions and CORRECT
Answers
Which of the following statements is consistent with a research study conducted with the
correlational method? - CORRECT ANSWER -Two variables are measured, and there is
only one group of participants.
A researcher is interested in average first semester change in weight (gain or loss) for students at
a local college. Thus, they record the individual change in weight for a small group of 25
freshman from this college during their first semester. Then, the researcher calculates the average
change in weight during the first semester among these 25 students. The average is an example
of a ______. - CORRECT ANSWER -Statistic
What is the value of Σ(X - 1)2 for the scores 1, 3, and 4? - CORRECT ANSWER -13
The average verbal SAT score for the entire class of incoming college freshmen in the United
States is 530. However, if a sample of 20 incoming college freshmen is randomly selected from
the United States, it is likely that this sample's average verbal SAT score will not be exactly 530.
This is consistent with the concept of _____. - CORRECT ANSWER -Sampling error
For the scores shown in the following stem and leaf display, what is the highest score in the
distribution?
Stem and Leaf Display
4 159
3 098
2 89103
1 39 - CORRECT ANSWER -49
, A set of scores ranges from a high of X = 18 to a low of X = 5. If these scores were put in a
grouped frequency distribution table with an interval width of 2 points, which of the following
would be the top interval in the table? - CORRECT ANSWER -18-19
For the following distribution of quiz scores, how many individuals had a score of X= 4?
Xf
61
56
44
34
22
1 2 - CORRECT ANSWER -4
Percentile ranks are closely tied to which of the following terms? - CORRECT
ANSWER -cumulative percentages
What is the value of Σ(X + 2) for the scores 1, 2, 1, and 3? - CORRECT ANSWER -15
The relationship between a statistic and a sample is the same as the relationship between _____. -
CORRECT ANSWER -a parameter and a population.
For the following grouped frequency distribution table, how many people have scores greater
than X = 45?
Xf
60-69 4
50-59 3
40-49 7
30-39 2 - CORRECT ANSWER -Cannot be determined
UPDATED Exam Questions and CORRECT
Answers
Which of the following statements is consistent with a research study conducted with the
correlational method? - CORRECT ANSWER -Two variables are measured, and there is
only one group of participants.
A researcher is interested in average first semester change in weight (gain or loss) for students at
a local college. Thus, they record the individual change in weight for a small group of 25
freshman from this college during their first semester. Then, the researcher calculates the average
change in weight during the first semester among these 25 students. The average is an example
of a ______. - CORRECT ANSWER -Statistic
What is the value of Σ(X - 1)2 for the scores 1, 3, and 4? - CORRECT ANSWER -13
The average verbal SAT score for the entire class of incoming college freshmen in the United
States is 530. However, if a sample of 20 incoming college freshmen is randomly selected from
the United States, it is likely that this sample's average verbal SAT score will not be exactly 530.
This is consistent with the concept of _____. - CORRECT ANSWER -Sampling error
For the scores shown in the following stem and leaf display, what is the highest score in the
distribution?
Stem and Leaf Display
4 159
3 098
2 89103
1 39 - CORRECT ANSWER -49
, A set of scores ranges from a high of X = 18 to a low of X = 5. If these scores were put in a
grouped frequency distribution table with an interval width of 2 points, which of the following
would be the top interval in the table? - CORRECT ANSWER -18-19
For the following distribution of quiz scores, how many individuals had a score of X= 4?
Xf
61
56
44
34
22
1 2 - CORRECT ANSWER -4
Percentile ranks are closely tied to which of the following terms? - CORRECT
ANSWER -cumulative percentages
What is the value of Σ(X + 2) for the scores 1, 2, 1, and 3? - CORRECT ANSWER -15
The relationship between a statistic and a sample is the same as the relationship between _____. -
CORRECT ANSWER -a parameter and a population.
For the following grouped frequency distribution table, how many people have scores greater
than X = 45?
Xf
60-69 4
50-59 3
40-49 7
30-39 2 - CORRECT ANSWER -Cannot be determined
