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WorksheetsRMSII Exam 1 Prep
Total questions: 20
Worksheet time: 16mins
What is the mean of the following scores?
4, 2, 3, 5
3.50
2
4
2.50
What is the median for the following scores?
2
1
5
4
3
3
2.5
3.5
5
What is the mode for the following scores?
3
2
1
3
3
2.5
1
1.5
A researcher asked people how much they liked Missy Elliott on a 7-point scale. Here are their responses:
3
5
6
2
7
What is the variance of these scores?
3.44
6
4.30
0
In the previous question, the researcher also needed to report the standard deviation of the scores. What is the standard deviation for the scores?
3
5
6
2
7
1.85
2
2.07
0
Which hypothesis are we always testing in this course?
The research hypothesis
The alternative hypothesis
The rejected hypothesis
The null hypothesis
Name the 3 types of ways we can measure central tendency?
variance, standard deviation, mean
mode, frequency, probability
median, mode, variance
mean, median, and mode
The IRB is
a committee at research institutions that reviews studies to ensure that they are using the best research methods
a committee at research institutions that reviews studies to ensure that studies with human participants are always conducted ethically
a committee that means to review institutions.
a board of reviewers that is mostly comprised of students.
Good research is
research where we accept the null hypothesis
correlational research
ethical research with a testable hypothesis that is likely to be true
experimental research
A variable is
the same as the independent variable
anything that can be changed or measured in a research study
a variant of the word, statistic
the people who are measured in a research study
What is the difference between a directional and non-directional hypothesis.
A non-directional hypothesis will expect that the relationship between two variables will be in a specific direction, a directional hypothesis does not specify a direction.
A directional hypothesis will expect that the relationship between two variables will be in a specific direction, a non-directional hypothesis does not specify a direction.
There is no difference; they are essentially the same.
We reject the directional hypothesis and accept the non-directional hypothesis.
Big N, signified by a capital N, symbolizes
The number of scores
Whether we rejected or accepted the null hypothesis
The number of participants
The number of variables
A variable in which participants can belong to different groups is called
a continuous variable
an independent variable
a dependent variable
a categorical variable
Plainly speaking, the independent variable is the ______ and the dependent variable is the _____.
cause, effect
effect, cause
factor, importance
research, study
The main problem with correlational research is
we can gather too much data
we cannot determine cause and effect
we might use unreliable surveys
we will have difficulty recruiting participants
You have a raw score of 3 in a set of scores with a mean of 4.6 and standard deviation of 2.07. Standardize the score.
.66
-.77
.77
0
Imagine you measured depression and life satisfaction. Below are the Z-Scores for each variable. Calculate the correlation.
Depression
Participant 1: -1
Participant 2: 1
Participant 3: 0
Life Satisfaction
Participant 1: -1
Participant 2: 0
Participant 3: 1
r = 1.00
r = -.50
r = .50
r = -1.00
How would you describe r = .80
It is a positive correlation that is large
It is a negative correlation that is small
It is a positive correlation that is moderate
It is a perfect negative correlation
Imagine you calculate r = -.20. You predicted a negative correlation, but you decided to do a two-tailed test. Is this a significant correlation?
Yes
No
Not enough information is provided
Imagine you calculate r = -.40. You predicted a negative correlation, but you decided to do a two-tailed test. If you had 30 participants, is this a significant correlation?
Yes
No
There is not enough information provided
