STA 2122 Exam 1
Bar graph - ✔✔graph showing differences in frequencies among categories of nominal or ordinal
variable
Hypothesis - ✔✔tentative answer to a research problem
Cumulative frequency distribution - ✔✔showing frequency at or below each category
independent variable - ✔✔Variable expected to account for the "cause" of dependent variable
cumulative percentage distribution - ✔✔distribution showing percentage at or below each category
(class interval or score) of variable
inferential stats - ✔✔Logic and procedures concerned with making predictions or inferences about a
population from observations and analyses of a sample
data - ✔✔
interquartile range (IQR) - ✔✔width of the middle 50% of the distribution defined as the difference
between the lower and upper quartiles
dependent variable - ✔✔To be explained the "effect"
interval-ratio measurement - ✔✔Measurements for all cases are expressed in same units
descriptive stats - ✔✔procedures that help us organize and describe data collected from either a sample
or a population
line graph - ✔✔Graph showing differences in frequencies or percentages among the categories of
interval ratio variable
dichotomous variable - ✔✔variable that only has 2 values
mean - ✔✔measure of central tendency that is obtained by adding up all the scores and dividing by the
total number of scores "average"
empirical research - ✔✔based on evidence that can be verified by using our direct experience
measures of central tendency - ✔✔
frequency distribution - ✔✔table reporting the number of observations falling into each category of the
variable
measures of variability - ✔✔numbers that describe diversity or variability in the distribution of a variable
Bar graph - ✔✔graph showing differences in frequencies among categories of nominal or ordinal
variable
Hypothesis - ✔✔tentative answer to a research problem
Cumulative frequency distribution - ✔✔showing frequency at or below each category
independent variable - ✔✔Variable expected to account for the "cause" of dependent variable
cumulative percentage distribution - ✔✔distribution showing percentage at or below each category
(class interval or score) of variable
inferential stats - ✔✔Logic and procedures concerned with making predictions or inferences about a
population from observations and analyses of a sample
data - ✔✔
interquartile range (IQR) - ✔✔width of the middle 50% of the distribution defined as the difference
between the lower and upper quartiles
dependent variable - ✔✔To be explained the "effect"
interval-ratio measurement - ✔✔Measurements for all cases are expressed in same units
descriptive stats - ✔✔procedures that help us organize and describe data collected from either a sample
or a population
line graph - ✔✔Graph showing differences in frequencies or percentages among the categories of
interval ratio variable
dichotomous variable - ✔✔variable that only has 2 values
mean - ✔✔measure of central tendency that is obtained by adding up all the scores and dividing by the
total number of scores "average"
empirical research - ✔✔based on evidence that can be verified by using our direct experience
measures of central tendency - ✔✔
frequency distribution - ✔✔table reporting the number of observations falling into each category of the
variable
measures of variability - ✔✔numbers that describe diversity or variability in the distribution of a variable
