STAT 101 EXAM 1 QUIZZES RECENTLY
UPDATE| VERIFIED WITH DETAILED ACTUAL
SOLUTIONS
How data is stored and presented, comprised of variables measured on cases - answer ✔✔-Dataset
what we obtain information about, makes up a row in a dataset - answer ✔✔-Cases/ units
any characteristic that is recorded for each case, makes up a column in a dataset - answer ✔✔-Variable
divides cases into groups
measures a numerical quantity for each case - answer ✔✔-Categorical vs. Quantitative
includes all individuals or objects of interest
all the cases that we have collected data on (subset of the population) - answer ✔✔-Population vs.
Sample
the process of using data from a sample to gain info using the population - answer ✔✔-Statistical
inference
occurs when the method of selecting a sample causes the sample to differ from the population in some
relevant way, cannot trust generalizations from sample to the population - answer ✔✔-Sampling Bias
only way to really avoid sampling bias, have averages that are centered around the correct number
, may suffer from sampling bias, and averages may not be centered around the correct number - answer
✔✔-Random samples vs. Non-random samples
each unit of the population has the same chance of being selected, regardless of the other units chosen
for the sample - answer ✔✔-Simple random sample
letting people choose to participate - answer ✔✔-Volunteer bias
independent variable
using one variable to help us understand values of another variable
shown on x-axis - answer ✔✔-Explanatory variable
dependent variable
using one variable to help us predict values of another variable
shown on y-axis - answer ✔✔-Response variable
values of one variable tend to be related to values of the other variable
changing the value of the explanatory variable influences the response variable - answer ✔✔-Associated
vs. Causally associated
a third variable that is associated with both the explanatory variable and the response variable - answer
✔✔-Confounding variable
a study in which the researcher does not actively control the value of any variable, but simply observes
the values as they exist naturally
**cannot be used to establish causation** - answer ✔✔-Observational study
a study in which the researcher actively controls one or more of the explanatory variables - answer ✔✔-
Experiment
UPDATE| VERIFIED WITH DETAILED ACTUAL
SOLUTIONS
How data is stored and presented, comprised of variables measured on cases - answer ✔✔-Dataset
what we obtain information about, makes up a row in a dataset - answer ✔✔-Cases/ units
any characteristic that is recorded for each case, makes up a column in a dataset - answer ✔✔-Variable
divides cases into groups
measures a numerical quantity for each case - answer ✔✔-Categorical vs. Quantitative
includes all individuals or objects of interest
all the cases that we have collected data on (subset of the population) - answer ✔✔-Population vs.
Sample
the process of using data from a sample to gain info using the population - answer ✔✔-Statistical
inference
occurs when the method of selecting a sample causes the sample to differ from the population in some
relevant way, cannot trust generalizations from sample to the population - answer ✔✔-Sampling Bias
only way to really avoid sampling bias, have averages that are centered around the correct number
, may suffer from sampling bias, and averages may not be centered around the correct number - answer
✔✔-Random samples vs. Non-random samples
each unit of the population has the same chance of being selected, regardless of the other units chosen
for the sample - answer ✔✔-Simple random sample
letting people choose to participate - answer ✔✔-Volunteer bias
independent variable
using one variable to help us understand values of another variable
shown on x-axis - answer ✔✔-Explanatory variable
dependent variable
using one variable to help us predict values of another variable
shown on y-axis - answer ✔✔-Response variable
values of one variable tend to be related to values of the other variable
changing the value of the explanatory variable influences the response variable - answer ✔✔-Associated
vs. Causally associated
a third variable that is associated with both the explanatory variable and the response variable - answer
✔✔-Confounding variable
a study in which the researcher does not actively control the value of any variable, but simply observes
the values as they exist naturally
**cannot be used to establish causation** - answer ✔✔-Observational study
a study in which the researcher actively controls one or more of the explanatory variables - answer ✔✔-
Experiment
