Exam 1 Psychology Stats 330 Robin
Akawi Questions and Answers
Students who have read the first chapter of the textbook and theorize that performance
on statistics exams will be related to the number of hours spent studying statistics know
that to test their theory, they will need to use - ANS-inferential statistics.
Each of several patients rate their degree of depression, and if a particular patient's
depression is rated 8 on a 20-point scale, 8 represents that patient's - ANS-score.
If a difference between scores of 3 and 4 is the same as a difference between scores of
15 and 16, the variable being measured is - ANS-equal-interval.
The length of time a person talks in a group discussion is an example of a(n) - ANS-
continuous variable.
If the exact degree of difference between two scores has no meaning beyond the fact
that one is higher than the other, the level of measurement is - ANS-rank-order
(ordinal).
If a psychologist summarizes data for a variable in a frequency table, but finds that there
are so many values for the variable that the table is too cumbersome to be useful, the
next step would be to make a - ANS-grouped frequency table.
In a histogram, the vertical line (dimension) shows the _____________, while the
horizontal line (dimension) shows the _______________. - ANS-frequency; possible
values the variable can have.
The best way to display a nominal variable is to use a - ANS-bar graph.
If a psychologist rating empathic responses to strangers' distress on a scale of 1 to 20
finds that most participants have ratings of either 8 or 16, the distribution of ratings is -
ANS-bimodal.
If someone told you that a distribution showed a ceiling effect, you would surmise that it
is ____________________ and that most individuals COULD have gotten
___________ scores with a larger range of possible scores. - ANS-negatively skewed;
higher.
Based on the scores 1, 9, 3, 6, 1, 2, 6, 2, 2, and 8...
A score of 4 is the ___________
, A score of 2 is the ___________
A score of 2.5 is the ___________. - ANS-mean; mode; median.
The mean and the mode for a statistics test will be the same if the distribution is - ANS-
normal.
Which statement is true for the scores of 1, 2, 3, 4, 5, 5, 7, 8, 9, and 10? - ANS-The
mean is to the right of the median.
If a cognitive psychologist finds that a group of one-year-old children can name 3, 3, 3,
4, 4, 5, 6, 7, 8, 9, 10, and 35 things, the most useful measure of central tendency will be
the - ANS-median.
The variance is the same as the - ANS-average of the squared deviations.
If the variance is 9, then the standard deviation is - ANS-3
The "sample variance" of the scores 1, 4, and 7 is ______
So then the sample's standard deviation is ______ - ANS-9; 3
A psychologist is most likely to calculate Z scores in order to - ANS-compare scores
obtained from two different scales.
Molly wants to pursue a graduate degree at New University but is unsure whether to
specialize in law or medicine. To help her decide, she takes the MCAT and LSAT
exams.
LSAT: Molly's score = 120; Students at New University: M = 150, SD = 15
MCAT: Molly's score = 52; Students at New University: M = 40, SD = 6
Question:
Molly's Z scores were... - ANS-LSAT, Z = -2.00; MCAT Z = 2.00
Molly wants to pursue a graduate degree at New University but is unsure whether to
specialize in law or medicine. To help her decide, she takes the MCAT and LSAT
exams.
LSAT: Molly's score = 120; Students at New University: M = 150, SD = 15
MCAT: Molly's score = 52; Students at New University: M = 40, SD = 6
Question:
In relation to the other people at New University, on which test did Molly get the better
score? - ANS-MCAT
When a result is not statistically significant at our desired 5% probability cutoff, the
correct decision is to - ANS-fail to reject the null hypothesis because our p value is
greater than .05
Akawi Questions and Answers
Students who have read the first chapter of the textbook and theorize that performance
on statistics exams will be related to the number of hours spent studying statistics know
that to test their theory, they will need to use - ANS-inferential statistics.
Each of several patients rate their degree of depression, and if a particular patient's
depression is rated 8 on a 20-point scale, 8 represents that patient's - ANS-score.
If a difference between scores of 3 and 4 is the same as a difference between scores of
15 and 16, the variable being measured is - ANS-equal-interval.
The length of time a person talks in a group discussion is an example of a(n) - ANS-
continuous variable.
If the exact degree of difference between two scores has no meaning beyond the fact
that one is higher than the other, the level of measurement is - ANS-rank-order
(ordinal).
If a psychologist summarizes data for a variable in a frequency table, but finds that there
are so many values for the variable that the table is too cumbersome to be useful, the
next step would be to make a - ANS-grouped frequency table.
In a histogram, the vertical line (dimension) shows the _____________, while the
horizontal line (dimension) shows the _______________. - ANS-frequency; possible
values the variable can have.
The best way to display a nominal variable is to use a - ANS-bar graph.
If a psychologist rating empathic responses to strangers' distress on a scale of 1 to 20
finds that most participants have ratings of either 8 or 16, the distribution of ratings is -
ANS-bimodal.
If someone told you that a distribution showed a ceiling effect, you would surmise that it
is ____________________ and that most individuals COULD have gotten
___________ scores with a larger range of possible scores. - ANS-negatively skewed;
higher.
Based on the scores 1, 9, 3, 6, 1, 2, 6, 2, 2, and 8...
A score of 4 is the ___________
, A score of 2 is the ___________
A score of 2.5 is the ___________. - ANS-mean; mode; median.
The mean and the mode for a statistics test will be the same if the distribution is - ANS-
normal.
Which statement is true for the scores of 1, 2, 3, 4, 5, 5, 7, 8, 9, and 10? - ANS-The
mean is to the right of the median.
If a cognitive psychologist finds that a group of one-year-old children can name 3, 3, 3,
4, 4, 5, 6, 7, 8, 9, 10, and 35 things, the most useful measure of central tendency will be
the - ANS-median.
The variance is the same as the - ANS-average of the squared deviations.
If the variance is 9, then the standard deviation is - ANS-3
The "sample variance" of the scores 1, 4, and 7 is ______
So then the sample's standard deviation is ______ - ANS-9; 3
A psychologist is most likely to calculate Z scores in order to - ANS-compare scores
obtained from two different scales.
Molly wants to pursue a graduate degree at New University but is unsure whether to
specialize in law or medicine. To help her decide, she takes the MCAT and LSAT
exams.
LSAT: Molly's score = 120; Students at New University: M = 150, SD = 15
MCAT: Molly's score = 52; Students at New University: M = 40, SD = 6
Question:
Molly's Z scores were... - ANS-LSAT, Z = -2.00; MCAT Z = 2.00
Molly wants to pursue a graduate degree at New University but is unsure whether to
specialize in law or medicine. To help her decide, she takes the MCAT and LSAT
exams.
LSAT: Molly's score = 120; Students at New University: M = 150, SD = 15
MCAT: Molly's score = 52; Students at New University: M = 40, SD = 6
Question:
In relation to the other people at New University, on which test did Molly get the better
score? - ANS-MCAT
When a result is not statistically significant at our desired 5% probability cutoff, the
correct decision is to - ANS-fail to reject the null hypothesis because our p value is
greater than .05
