Quiz: Predictive Research Methods and
Single-Sample Tests
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Score for this quiz: out of 10090
Submitted Dec 4 at 1:51pm
This attempt took 131 minutes.
Question 1
2.5 / 2.5 pts
The top number provided in output produced by SPSS for the Pearson correlations
analysis is:
the two-tailed p-value
the correlation coefficient
sample size (N)
degrees of freedom
Question 2
2.5 / 2.5 pts
SPSS output produces a -value associated with the test statistic. If it is smaller than p
your chosen alpha level (typically 0.05), you ________ the null hypothesis.
fail to reject
test
accept
Quiz: Predictive Research Methods and
Single-Sample Tests
reject
Question 3
2.5 / 2.5 pts
A ___________ correlation indicates that both variables increase and decrease
simultaneously (in the same direction).
positive
negative
curvilinear
weak
Question 4
2.5 / 2.5 pts
Which of the following tests is most suitable for if you want to not only examine a
relationship but also be able to PREDICT one variable given the value of the other?
Point biserial correlation
Pearson’s r correlation
Independent samples t-test
Simple regression
Quiz: Predictive Research Methods and
Single-Sample Tests
Question 5
2.5 / 2.5 pts
If interested in the relationship between height (in inches) and weight (in pounds), which
test would be most appropriate?
Spearman’s correlation
Pearson’s r correlation
Point-biserial correlation
Phi correlation
Question 6
2.5 / 2.5 pts
If a researcher concludes that cereal color has no effect on amount consumed but the
researcher was wrong in this conclusion, which of the following best represents his
decision?
correct decision
Type I error
Type II error
Type III error
Quiz: Predictive Research Methods and
Single-Sample Tests
Question 7
2.5 / 2.5 pts
Which of the following correlation coefficients is the strongest?
0.03
-0.51
-0.94
0.83
Question 8
2.5 / 2.5 pts
Which of the following do you statistically test when hypothesis testing?
research hypothesis
alternative hypothesis
null hypothesis
both A and B
Quiz: Predictive Research Methods and
Single-Sample Tests
Question 9
2.5 / 2.5 pts
If conducting a correlation, which graph is most appropriate?
histogram
scatterplot
line graph
pie chart
Question 10
2.5 / 2.5 pts
The alpha level used most commonly in the social sciences (and always in this class) is:
0.01
0.05
0.95
0.50
Question 11
2.5 / 2.5 pts
Quiz: Predictive Research Methods and
Single-Sample Tests
Calculate the coefficient of determination given that N=17, r = 0.14, and p = .67
0.0289
0.0196
0.4489
0.14
Question 12
2.5 / 2.5 pts
If a researcher concludes that worker productivity significantly increased when playing
upbeat music but in fact, worker productivity does NOT increase when playing upbeat
music, which of the following best represents her decision?
correct decision
Type III error
Type II error
Type I error
Question 13
2.5 / 2.5 pts
Quiz: Predictive Research Methods and
Single-Sample Tests
If the points on a scatterplot are spread all over the graph, this would suggest that the
two variables depicted are
normally distributed.
positively correlated.
strongly related.
not correlated.
Question 14
2.5 / 2.5 pts
The _____ is a measure of the proportion of variance in one of the variables that is
accounted for by the other variable.
Spearman rank-order correlation coefficient
coefficient of determination
point-biserial correlation coefficient
Pearson product-moment correlation coefficient
Question 15
2.5 / 2.5 pts
In order to increase the power of z test, one might
Quiz: Predictive Research Methods and
Single-Sample Tests
increase sample size.
use a two-tailed test.
decrease sample size.
none of the options is correct
Question 16
2.5 / 2.5 pts
In a study with 25 participants and s = 15, the estimated standard error of the
mean (as you'd need to solve before conducting a t test) would be
0.6.
3.0.
2.0.
2.6.
Question 17
2.5 / 2.5 pts
A _____-tailed test and a _____ sample size will both increase the power of the test.
Quiz: Predictive Research Methods and
Single-Sample Tests
two; larger
one; larger
two; smaller
one; smaller
Question 18
2.5 / 2.5 pts
The problem of a correlation between two variables being dependent on another
variable is called _____.
the third-variable problem
causality
directionality
restrictive range
IncorrectQuestion 19
0 / 2.5 pts
Given that on one section of the SAT the mean is 500 and the standard deviation is 100, which of the
following best depicts how to solve for the approximate probability of a student scoring 300 or
lower 00 or higher on the test? OR 7
Quiz: Predictive Research Methods and
Single-Sample Tests
.02275 + .97725
.02275 x .97725
.02275 + .02275
.02275 x .02275
Incorrect. See Jackson textbook, ch. 7
Question 20
2.5 / 2.5 pts
No effect is to _____ hypothesis as effect is to _____ hypothesis.
null; alternative
alternative; null
one-tailed; two-tailed
two-tailed; one-tailed
Question 21
2.5 / 2.5 pts
In a recent study, researchers concluded that exercise significantly lowered stress
levels. What the researchers were unaware of, however, was that several of the
participants in the exercise group were also taking anti-anxiety medications. The
researchers’ conclusion is a(n) _____ error.
Quiz: Predictive Research Methods and
Single-Sample Tests
Type II
Type I
null hypothesis
alternative hypothesis
Question 22
2.5 / 2.5 pts
The problem of _____ can often be identified by using a _____.
causality; point-biserial correlation
directionality; phi coefficient
third variables; partial correlation
restrictive range; point-biserial correlation
IncorrectQuestion 23
0 / 2.5 pts
If a researcher reported for a two-tailed single-sample t test that t(13) = 1.46, then
p < .05; results are significant
Quiz: Predictive Research Methods and
Single-Sample Tests
p < .05; results are not significant
p > .05; results are significant
p > .05; results are not significant
Incorrect. See Jackson textbook, ch. 8
Question 24
2.5 / 2.5 pts
In the case of a positive relationship, as scores on X _____, scores on Y _____.
increase; decrease
decrease; increase
decrease; decrease
none of the other alternatives is correct
Question 25
2.5 / 2.5 pts
What is the probability of a couple having three children in the following order: girl, girl,
girl?
0.0625
0.125
Quiz: Predictive Research Methods and
Single-Sample Tests
0.25
0.50
Question 26
2.5 / 2.5 pts
Given that on one section of the SAT the mean is 500 and the standard deviation is 100,
what is the approximate probability of selecting a student whose score is 600 or higher
on the test?
.34
.31
.16
.43
Question 27
2.5 / 2.5 pts
The hypothesis predicting that differences exist between the groups being compared is
to the hypothesis predicting that no differences exist between the groups being
compared as _____ hypothesis is to _____ hypothesis.
null; alternative
alternative; null
Quiz: Predictive Research Methods and
Single-Sample Tests
one-tailed; two-tailed
two-tailed; one-tailed
Question 28
2.5 / 2.5 pts
Imagine that you conducted a single-sample t test with 12 participants. For a two-tailed
test, the tcv at a = 0.05 would be
±1.796.
±2.074.
±2.179.
±2.201.
Question 29
2.5 / 2.5 pts
Directional hypothesis is to nondirectional hypothesis as _____ hypothesis is to _____
hypothesis.
null; alternative
alternative; null
Quiz: Predictive Research Methods and
Single-Sample Tests
one-tailed; two-tailed
two-tailed; one-tailed
Question 30
2.5 / 2.5 pts
Two interval/ratio variables are to _____ coefficient as one interval/ratio variable and
one nominal variable are to _____ coefficient.
Pearson product-moment correlation; Spearman rank-order correlation
Spearman rank-order correlation; Pearson product-moment correlation
phi; Spearman rank-order correlation
Pearson product-moment correlation; point-biserial correlation
Question 31
2.5 / 2.5 pts
Seven students reported the following individual earnings from their sale of wrapping
paper: $7, $13, $3, $5, $2, $9, and $3. In this distribution of individual earnings, the
mean is _____ the mode and _____ the median.
equal to; equal to
greater than; equal to
Quiz: Predictive Research Methods and
Single-Sample Tests
equal to; less than
greater than; greater than
Question 32
2.5 / 2.5 pts
Rich is conducting a survey of student opinion of the dining hall at his university. In
order to make sure that students from each major are adequately represented he
should use the _____ sampling technique.
random
cluster
stratified random
convenience
IncorrectQuestion 33
0 / 2.5 pts
Using the class interval frequency table below, identify the of the last lower class limit
class interval.
# completed tasks frequency Relative frequency
0-9 2 0.07
10-19 3 0.11
20-29 5 0.18
30-39 4 0.14
40-49 5 0.18
50-59 6 0.21
Quiz: Predictive Research Methods and
Single-Sample Tests
60-69 3 0.11
N=28
50
60
59
69
No. Answer is found in the presentations from Weeks 3 – 4.
Question 34
2.5 / 2.5 pts
The _____ method involves describing data that existed before the time of the study.
case study
naturalistic observational
laboratory observational
archival
IncorrectQuestion 35
0 / 2.5 pts
Quiz: Predictive Research Methods and
Single-Sample Tests
If Lane had a score of (NEGATIVE) -1.41, what percent of people scored HIGHER z
than her?
7.926%
42.074%
57.926%
92.074%
No. Answer is found in the presentations from Weeks 3 – 4.
Question 36
2.5 / 2.5 pts
What term used in ethics is related to methods of gathering information from research
subjects to enable them to have control over the extent, timing, and circumstances of
sharing oneself (physically, behaviorally, or intellectually) with others (note an example
would be like reminding them to close their browser after completing an online survey)?
privacy
confidentiality
snowball sampling
informed consent
Quiz: Predictive Research Methods and
Single-Sample Tests
Question 37
2.5 / 2.5 pts
A summary of the data collected and the type of statistics used to analyze the data is to
the _____ section as a very brief description of the entire paper is to the _____ section.
Results; Introduction
Introduction; Abstract
Results; Abstract
Discussion; Abstract
Question 38
2.5 / 2.5 pts
_____ allows you to research by topic whereas _____ allows you to work from a given
article.
The SSCI; the SCI
The SSCI; PsycINFO
PsycINFO; the SSCI
ERIC; the SCI
Quiz: Predictive Research Methods and
Single-Sample Tests
Question 39
2.5 / 2.5 pts
_____ is an indication of the consistency or stability of a measuring instrument.
Validity
Reliability
The true score
A correlation
Question 40
2.5 / 2.5 pts
A researcher wants to see if lighting levels affects worker productivity at the Lights-n-More factory. To condu
researcher manipulates the lighting levels each week for a month, and assesses worker productivity for each
scenario, what is the constant (NOT a variable)?
lighting level
worker productivity
Lights-N-More factory
none of the above
Quiz Score: out of 10090
Quiz: Predictive Research Methods and
Single-Sample Tests
