a ___ is a subset of a population
sample
which scenarios use the nominal scale
Noting the racial composition of an undergraduate classroom
Designating males as 1 and females as 2
an example of cross-sectional data
results of market research testing consumer preferences for soda
a characteristic of interest that differs among various observations is referred to as a ___
variable
least accurate
ratio scale is used for a qualitative variable
data that are collected by recording a characteristic of a subject over several time periods are referred to as
time series data
example of inferential statistics
testing the longevity of all light bulbs based on a sample of 100 light bulbs
we use sample data because
obtaining data from the population is often expensive
branch of stats that summarizes impt aspects of a data set is
descriptive statistics
qualitative data that can be categorized and ranked are measured on the
ordinal scale
the number of ppl in a household." This variable is best categorized as a
discrete variable
statistics is used
to make informed decisions based on data
branch of stats that draws conclusions about a large set of data based on a smaller set of data is
inferential statistics
the interval scale of measurement is
less sophisticated than the ratio scale
the ordinal scale of data measurement is
more sophisticated than the nominal scale
which characteristic of interest is a variable
the number of pizzas ordered from pizza hut per day
which scales of data measurement are associated with quantitative data
interval and ratio
weakness of the ordinal scale
an inability to measure differences between the ranked values
samples are primarily used to
make inferences about population parameters
data collected about many subjects at the same point in time or without regards to differences in time is known as ___ data
cross-sectional
a variable that is described verbally rather than numerically is called a
qualitative variable
all are examples of cross-sectional data except
quarterly sales for a computer company for the last 5 years