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Intro to Probability Theory Flashcards | StudBud
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Intro to Probability Theory
Intro to Probability Theory
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1
_______ distributions are
tallies
of the number of times that we observe the different values of a variable.
positively skewed
negatively skewed
frequency
probability
2
The standard normal curve has a mean of ____.
2
1
10
0
3
The probability of an event occurring can never be
less
than ______.
0
100
1
10
4
Probability(Event A) = the number of times Event A occurs divided by the number of possible events or trials.
True
False
5
z-scores are expressed in
half units
units squared
standard deviation units
original (raw score) units
6
A z-score represents how many standard deviations a raw score is from _______.
the highest value
the range
the lowest value
the mean
7
_______ distributions are
theoretical
distributions of what we should observe over the long run.
probability
frequency
negatively skewed
positively skewed
8
_______ is the foundation of inferential statistics
central tendency
variability
probability
linear algebra
9
A z-score that falls
above
the mean is ______.
negative
equal to -1
equal to 0
positive
10
A z-score that falls
below
the mean is _______.
negative
positive
equal to +1
equal to 0
11
The standard normal curve has a standard deviation of ____.
1
0
2
10
12
The probability of an event occurring can never be
greater
than ______.
100
10
0
1
13
Which of the following do we need to convert a raw score into a z-score for a variable? (Select
ALL
that apply)
mean of the variable (x-bar)
standard deviation of the variable (s)
range of the variable (r)
value of the raw score (x)
