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paper 2
research methods
descriptive statistics
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lydia🇵🇱
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Cards (12)
primary data is
original
data collected
first hand
secondary data is data that has
already
been
collected
and stored by
someone
else.
primary data is more
valid
as it is
specific
to the
purpose
of the study
primary data is more
time consuming
to collect, meaning we could end up with
less data
measures of central tendency is the
typical average score
from the data set (
mode
,
median
,
mean
)
measures of dispersion is how
spread out
the scores in a data set are (
range
,
standard deviation
)
the mean includes
all scores
but
is
affected by
extreme scores
the median and mode don’t include all scores but aren’t affected by
extreme scores
normal distributions- when the mean, median and mode are at the
highest peak
of the distribution
positive skewed distribution- when the data is concentrated to the
left
, with the
mode
and
median
being
below
the
mean
to make a more normal distribution:
adjust
difficulty
of test
make it
easier
/ more
difficult
so more get a
higher
/
lower
mark
making a more
normal distribution
negatively skewed data is concentrated to the
right
with the
mode
and
median
being
higher
than the
mean