Post on 05-Jan-2016
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Which is not a measure of central tendency?
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Mode
Mean
Maximum
Median
Which of the following is resistant to extreme values?
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Mean
Range
Maximum
Mode
Which of the following does NOT indicate a positive association?
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r = .009r = .099
b1 = .456
r2 = .81
r > 0
If the persons in a sample are chosen to meet the demographics of the population, the sample will be
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A quota sample
A stratified sample
A cluster sample
A voluntary response sample
If representation of all four classes in a high school sample is of importance, which sampling design is appropriate?
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SRS
Systematic sample
Quota sample
Stratified random sample
Random digit tables and random number generators follow which of the following distributions?
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uniform
normal
t
binomial
If 10 is added to every value of a data set, which of the following occurs?
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Mean increases by 10
Median remains the same
Range increases by 10
Mean increases by 100
If a data set is transformed using (x, y) (ln x, ln y), the resulting regression model will be
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A power model
An exponential model
A quadratic model
A linear model
Sending an innocent person to prison is which of the following?
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Confidence level
Type I error
Type II error
Power
If the expected value of successes in a binomial experiment of 100 trials is 55, the standard deviation of number of successes is
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2.23
2.49
4.97
24.75
Order the following from least to greatest: I. Q3, II. Value at 70th percentile,
III. Value with a z-score of 1.
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I, II, III
III, II, I
II, I, III
III, I, II
The primary reason for use of blocking when designing an experiment is to reduce
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variation
the need for randomization
bias
confounding
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.
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I only
I and II
III only
II and III only
Two events that do not contain any of the same simple events (outcomes) is called
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independent
empty
mutually exclusive
conditional
When people think that the long-run frequency of an event should apply even in the short-run is referred to as
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Gambler’s fallacy
Law of large numbers
Law of averages
Law of small numbers
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