coy sumlar. survey of statistics a survey is an investigation about the characteristics of a given...
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MY VOCAB PROJECT
coy sumlar
SURVEY OF STATISTICS
A survey is an investigation
about the characteristics of a
given population by means of
collecting data from a sample of
that population and estimating
their characteristics through the
systematic use of statistical
methodology.
SURVEY OF STATISTICS
Example: survey of major league baseball players
hitting stats who do vs. don’t use steriods.
UNIVARITIVE DATA
Data for one variable
Example: Travel Time (in minutes): 15, 29, 8, 42, 35, 21,
18, 42, 26
The data is for the variable Travel Time
(If you have two sets of data, such as ice cream sales vs
temperature, it is called "Bivariate Data")
SURVEY QUESTION
Web term: a sentence of inquiry that asks for a reply.
Survey questions can be of different types and serve
to gather different sets of data.
COYS TERM: So basically A QUESTION THAT
SIMPLY as for a answer, so its non rhetorical. This
question can be put in to many different forms or
statements.
SPREAD
A measure of spread tells us how much a data sample
is spread out or scattered. We can use the range and the
interquartile range to measure the spread of a sample.
Measures of spread together with
measures of location (or central tendency) are important
for identifying key features of a sample to better
understand the population from which the sample comes
from.
NATURAL VARIABILITY
Variability definition, apt or liable to vary or
change; changeable: variable weather; math's. a. an
expression that can be assigned any of a set of
values ... weather events occur in the context of
natural variability and the changing climate.
HISTOGRAM
histogram is a graphical representation of the
distribution of data. It is an estimate of the
probability distribution of a continuous variable and was
first introduced by 1] A histogram is a representation of
tabulated frequencies, shown as adjacent rectangles,
erected over discrete intervals (bins), with an area equal
to the frequency of the observations in the interval.
TREATMENT
: the way that you think of and act toward someone
or something
: the way that you deal with or discuss a subject
: something that deals with or discusses a subject.
NON-RESPONSE BIAS
NON-RSPONSE BIAS occurs in statistical surveys
if the answers of respondents differ from the
potential answers of those who did not answer.
DIRECT DIFFRENCE IN A RESPONSE BIAS!!!!
HYPOTHESIS
A statement that is predicted to be true but you
run a test to see if it is in fact true or not.
SAMPLING
A selection taken from a larger group (the
"population") so that you can examine it to find out
something about the larger group. For example if a
baseball stats analysis who studied all three major
parts of baseball (hitting,pitching,fielding) just
studied Hitting statistics that would be a example of
sampling.
STATISTICAL DATA
Bias: Bias is a general statistical term meaning
a systematic (not random) deviation from the true
value. A bias of a measurement or a sampling
procedure may pose a more serious problem for
researcher than random errors because it cannot
be reduced by mere increase in sample size and
averaging the outcomes.
STATISTICS CHART
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4012345
Series 1Series 2Series 3
NON EXAMPLES
UNIVARITIVE DATA
NOPE! NOPE!
!!!!FAIL!!!
SURVEY OF STATISTICS
SPREAD