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Research
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1
The standard deviation is the square root of the variance. A z-score of +1 would be the same as:
one standard deviation below the mean
the median, as long as the population is normal
the same as the T-score
one standard deviation above the mean
2
If Dr. Ray's experiment utilizes two IVs, then the statistic of choice would be
the two-way ANOVA or MANOVA
the ANOVA
the t test
the median
3
On a test where the top score is 93 and the lowest score was 33 out of 100, the range would be:
77
There is not enough information
59
61
4
Experimental is to cause and effect, as correlational is to
blind studies
N = 1 designs
double-blind studies
degrees of relationships
5
Dr. Ray decides to increase the sample size in her experiment. This will
have virtually no impact on Type I and Type II errors
reduce Type I and Type II errors
raise the probability of Type I and Type II errors
confound the experiment in nearly every case
6
The variable that you manipulate/control in an experiment is called
extraneous variable
confounding variable
dependent variable
independent variable
7
If you were to correlate the length of the CACREP graduate's toes with their CPCE scores, the results would likely be
about +.70
close to a perfect 1.00
close to a perfect negative correlation of -1.00
close to 0.00
8
When you see the letter P in relation to a test of significance, it means
probability
the researcher is using a qualitative approach
population parameter
portion
9
A Type I error occurs when
you accept null when it is false
you fail to use a test of significance
you reject null when it is true
you have a beta error
10
A study that would best rule out chance factors would have a significance level of P =
.08
.01
.001
.05
11
The most common measures of central tendency are the mean, median, and mode. The mode is
the middle score in the distribution of scores
the arithmetic average
the most frequently occurring score
always 10% less than the mean
12
From a statistical standpoint, to compare the control group to the experimental group, the researcher needs
a percentile rank
a test of significance
a correlation coefficient
only descriptive statistics
13
Investigators found that a researcher unconsciously rated pretty females to be better counselors. This is an example of
observer bias
the Hawthorne effect
the Halo effect
the Rosenthal effect
14
The subject of a study is unaware if he is receiving a test drug or part of the control group, but the researchers know.
This is a double-blind study.
This is a single-blind study
This is a baseline for an intensive N=1 study
This is a participant observer model
