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correct answer.
Which is not a measure of central
tendency?
Mode
Maximum
Mean
Median
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correct answer.
Which of the following is resistant to
extreme values?
Mean
Maximum
Range
Mode
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correct answer.
Which of the following does NOT indicate a
positive association?
r r==.009
.099
b1 = .456
r2 = .81
r>0
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correct answer.
If the persons in a sample are chosen to meet the
demographics of the population, the sample will be
A quota sample
A cluster sample
A stratified sample
A voluntary
response sample
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correct answer.
If representation of all four classes in a high school sample is
of importance, which sampling design is appropriate?
SRS
Quota sample
Systematic sample
Stratified random
sample
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correct answer.
Random digit tables and random number generators
follow which of the following distributions?
uniform
t
normal
binomial
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correct answer.
If 10 is added to every value of a data set,
which of the following occurs?
Mean increases by 10
Range increases by 10
Median remains the same
Mean increases by 100
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correct answer.
If a data set is transformed using (x, y) (ln x, ln y), the
resulting regression model will be
A power model
A quadratic model
An exponential
model
A linear model
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correct answer.
Sending an innocent person to
prison is which of the following?
Confidence level
Type II error
Type I error
Power
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correct answer.
If the expected value of successes in a binomial
experiment of 100 trials is 55, the standard
deviation of number of successes is
2.23
4.97
2.49
24.75
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correct answer.
Order the following from least to greatest: I. Q3,
II. Value at 70th percentile,
III. Value with a z-score of 1.
I, II, III
II, I, III
III, II, I
III, I, II
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correct answer.
The primary reason for use of blocking
when designing an experiment is to reduce
variation
bias
the need for
randomization
confounding
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correct answer.
A random sample of size 10 taken from a population has
sample variance of 0. Which of the following is true?
I. 2 = 0.
II. S. mean = s. median III. All 10 pts same.
I only
III only
I and II
II and III only
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correct answer.
Two events that do not contain any of the
same simple events (outcomes) is called
independent
mutually exclusive
empty
conditional
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correct answer.
When people think that the long-run frequency of an
event should apply even in the short-run is referred to as
Gambler’s fallacy
Law of averages
Law of large
numbers
Law of small
numbers
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wrong
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on May 24, 2017
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