Data Science 1000B Final Exam Graded A+
Baseline risk - ANSWER-risk without treatment or behavior
Big Data - ANSWER-the huge and complex data sets generated by today's
sophisticated information generation, collection, storage, and analysis technologies
contains petabytes (10^15 bytes)
block design - ANSWER-
Cluster Sampling - ANSWER-A probability sampling technique in which clusters of
participants within the population of interest are selected at random, followed by data
collection from all individuals in each cluster.
conditional distribution - ANSWER-A conditional distribution of a variable is the
distribution of values of that variable among only individuals who have a given value of
the other variable
Ecological Correlation - ANSWER-a correlation based on averages rather than on
individuals
Explanatory variable is - ANSWER-independent
Marginal distribution - ANSWER-Distribution of values of that variable among all
individuals described by the table.
Marginal distributions tell us ______ about ______ - ANSWER-nothing; the relationship
btw 2 variables
Matched-pairs design - ANSWER-A method of assigning subjects to groups in which
pairs of subjects are first matched on some characteristic and then individually assigned
randomly to groups.
Multistage Sampling - ANSWER-a probability sampling technique involving at least two
stages: a random sample of clusters followed by a random sample of people within the
selected clusters
Odds ration - ANSWER-ratio of the odds of having a trait to the odds of not having the
trait
R-value
Positive correlation _____
Negative correlation _____
R-value range is always satisfies _________
Perfect correlation _______ - ANSWER-+ve correlation: r > 0
-ve correlation: r < 0
Baseline risk - ANSWER-risk without treatment or behavior
Big Data - ANSWER-the huge and complex data sets generated by today's
sophisticated information generation, collection, storage, and analysis technologies
contains petabytes (10^15 bytes)
block design - ANSWER-
Cluster Sampling - ANSWER-A probability sampling technique in which clusters of
participants within the population of interest are selected at random, followed by data
collection from all individuals in each cluster.
conditional distribution - ANSWER-A conditional distribution of a variable is the
distribution of values of that variable among only individuals who have a given value of
the other variable
Ecological Correlation - ANSWER-a correlation based on averages rather than on
individuals
Explanatory variable is - ANSWER-independent
Marginal distribution - ANSWER-Distribution of values of that variable among all
individuals described by the table.
Marginal distributions tell us ______ about ______ - ANSWER-nothing; the relationship
btw 2 variables
Matched-pairs design - ANSWER-A method of assigning subjects to groups in which
pairs of subjects are first matched on some characteristic and then individually assigned
randomly to groups.
Multistage Sampling - ANSWER-a probability sampling technique involving at least two
stages: a random sample of clusters followed by a random sample of people within the
selected clusters
Odds ration - ANSWER-ratio of the odds of having a trait to the odds of not having the
trait
R-value
Positive correlation _____
Negative correlation _____
R-value range is always satisfies _________
Perfect correlation _______ - ANSWER-+ve correlation: r > 0
-ve correlation: r < 0
