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AVIATION APPLICATIONS OF STATISTICS AND RESEARCH DESIGN Exam 1 Review Flashcards | StudBud
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AVIATION APPLICATIONS OF STATISTICS AND RESEARCH DESIGN Exam 1 Review
AVIATION APPLICATIONS OF STATISTICS AND RESEARCH DESIGN Exam 1 Review
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1
leptokurtic distribution definition
When results are influenced in one direction
a higher than normal distribution
a flatter than normal distribution
cause and effect between two variables
2
Platykurtic distribution definition
a flatter than normal distribution
the act of blinding both the subjects of an experimentand the researchers
A study based on data in which no manipulation offactors have been employed
a higher than normal distribution
3
applies to data collecteddirectly from members of a sample or population
generalize
Descriptive
Inferential
4
Representative Sampling
every member of a population has an equal chance ofbeing selected
chosen based on specificcharacteristics intrinsic to the wider population
on basis of proximity, ease-of-access, or willingness to participate
5
The standard deviation is the square root ofthe variance
True
False
6
Whats a data set?
the relation between cause and effect
a collection of measurements or observations
number of times data is observed in the data set
When results are influenced in one direction
7
Whats a Quantitative Variable
variables are numeric and represent ameasurable quantity
variables are numeric and represent ameasurable quantity
8
What are the different types of skewed data
all of the above
Normal(no skew)
negatively skewed
positively skewed
9
variation definition
a story someone tells
Any pieces of information acquired throughobservation or experimentation
one that takes on values expressed as numbers
difference between data
10
attribute has relative value or rankingbut no indication of distance or spread
interval
ordinal
nominal
ratio
11
Convenience- members selected on basis of proximity, ease-of-access, or willingness to participate
True
False
12
whats The difference between the largest and smallest values in data set called?
Variance
IQR
Z-score
Range
13
Distributions give indications to how data isspread
True
False
14
you can find z-score using a sample population
False
True
15
rate definition
long columns, one for categories and another forvalues
Each column represents a variable from a differentgroup
difference between data
similar to percentage but after dividing multiply timesthe rate
16
n=sample
False
True
17
Random sampling
every member of a population has an equal chance ofbeing selected
based on specificcharacteristics intrinsic to the wider population
basis of proximity, ease-of-access, or willingness to participate
18
N= Sample
True
False
19
How many bins can your histogram have?
7
9
3
5
20
is this a population mean equation x(bar) = Σx / n
True
False
21
whats a Qualitative variable
variables are numeric and represent ameasurable quantity
variables take on values that arenames or labels
22
random selection definition
describes two categorical variables
selecting a sample that gives everymember of the population an equal chance
When results are influenced in one direction
similar to percentage but after dividing multiply timesthe rate ie 1000
23
as relative value and distance, but lacksan absolute minimum
ordinal
interval
ratio
nominal
24
is this a sample mean equation μ = ΣX / N
False
True
25
kurtosis definition
height of a distribution
a flatter than normal distribution
The variable that researchers want to predict
a higher than normal distribution
26
s2 is sample variance
False
True
27
has relative value, distance, and absolutezero
nominal
ordinal
interval
ratio
28
sample definition
the entire aggregation of items from whichsamples can be drawn
A group of subjects selected from a population
number of times data is observed in the data set
Any pieces of information acquired throughobservation or experimentation
29
statistics definition
difference between the two groups that can explain why the outcomes
collecting and analyzing observationsto learn about ourselves, surroundings
the relation between cause and effect
Any pieces of information acquired throughobservation or experimentation.
30
Whats this symbol μ
Populationvariance
PopulationStandarddeviation
population mean
Summation
31
Whats this symbol P(A)
population mean
PopulationStandarddeviation
probabilityfunction/probability of event A
probability ofeventsintersection
32
sample size X(Bar)
sample mean
PopulationProportion
standard score
33
attribute has no weight or relative value
ordinal
ratio
interval
Nominal
34
Measure of variability based on dividing dataset into quartiles
IQR
Standard Deviation
Z-Score
Variance
35
Continuous variables can
Only take one specific, countable numerical variables within a range set
take on values between aminimum and maximum
36
How many types of skewed data are there?
2
4
3
37
Population definition
(statistics) the entire aggregation of items from whichsamples can be drawn
The variable that researchers want to predict
A group of subjects selected from a population.
Assignment left to chance such as flipping a coin
38
Data Definition
a collection of measurements or observations
group that does not receive treatment
difference between the two groups that can explainwhy the outcomes
Any pieces of information acquired throughobservation or experimentation
39
what are these Q1, Q2, Q3
Null Hypothesis
standard score
Population Size
Quateriles, upper, middle lower
40
what symbol is this σ2
Populationvariance
sample mean
Population size
chi-square
41
is this the equation for z-score z = (x- μ) /σ
False
True
42
What are characteristics if a normal Distribution
Mean, median, and mode occupy same position
negatively skewed
Asymptotic
Symmetrical
43
How many scales of measurement are used in statistics
3
7
6
4
44
variables definition
difference between data
describes two categorical variables
conditions, events, characteristics, orbehaviors are controlled or observe
Each column represents a variable from a differentgroup
45
How many measures of central tendency are there
3
4
6
2
46
p=sample
True
False
47
Frequency definition
number of times data is observed in the data set
The variable that researchers want to predict
one that takes on values expressed as numbers
a higher than normal distribution
48
discrete variables can
can only take specific numeric values
False
True
49
P=Population
False
True
50
random assignment definition
Assignment left to chance such as flipping a coin
a method of selecting a sample that gives every member of the population
A group of subjects selected from a population.
describes two categorical variables
51
what symbol is this σ
PopulationStandarddeviation
standard score
Sampleproportion
sample variance
52
How many typical measures of dispersion are there?
4
6
7
5
53
Quantitative variables can be described as?
neither
continuous
discrete
both
54
whats this ∑?
Sigma
Lower quartile
sample size
chi-square
55
z-scores indicate howmany standard deviations an observation isremoved from the mean
False
True
56
types sampling
Random, Convenience
Random, Representative, Convenience
Random, Representative, Nominal
Representative, Random
57
Another measure of spread looking at how muchan observation deviates from the mean (sampleor population)
Variance
A-Score
Range
Z-score
58
How many types of variables are there
2
4
3
1
59
applies to data collectedfrom a sample that is used to make conclusions/assertions about the wider population
Nominal
Inferential
Descriptive
discrete
