QTM100 EXAM 1 - Emory University
what is in a data matrix? - ✔️✔️an array of rows and columns that stores observed
values of variables
- rows hold the data for each case or observational unit
- columns contain the values on a single variable for all the cases
numerical variables (and describe the 2 types) - ✔️✔️takes on a wide range of
numerical values that have some sort of meaning when you add, subtract or take the
average of them
discrete: can only have specific values (whole numbers) , counted
continuous: can take on any value in an interval , measured
Randomized Controlled Trial - ✔️✔️A study design that randomly assigns participants
into an experimental group or a control group.
Ideally, the only difference between the control and experimental groups in a
randomized controlled trial is the outcome variable being studied
Learning Objectives (4 objectives) - ✔️✔️Understand the effect of study design on
interpretation of statistical results
Identify appropriate statistical methods when presented with new data
Read and interpret basic statistical literature
Use R to perform statistical analysis
summary statistic - ✔️✔️a single number summarizing a large amount of data
statistical significance - ✔️✔️the larger the difference we observe for a particular
sample size, the less believable it is that that difference is due to chance... ask yourself:
is the difference so large that we reject the notion that it was due to chance?
.
treatment group - ✔️✔️the participants in an experiment who are exposed to the level
of the independent variable that involves a medication, therapy, or intervention
what is in a data matrix? - ✔️✔️an array of rows and columns that stores observed
values of variables
- rows hold the data for each case or observational unit
- columns contain the values on a single variable for all the cases
numerical variables (and describe the 2 types) - ✔️✔️takes on a wide range of
numerical values that have some sort of meaning when you add, subtract or take the
average of them
discrete: can only have specific values (whole numbers) , counted
continuous: can take on any value in an interval , measured
Randomized Controlled Trial - ✔️✔️A study design that randomly assigns participants
into an experimental group or a control group.
Ideally, the only difference between the control and experimental groups in a
randomized controlled trial is the outcome variable being studied
Learning Objectives (4 objectives) - ✔️✔️Understand the effect of study design on
interpretation of statistical results
Identify appropriate statistical methods when presented with new data
Read and interpret basic statistical literature
Use R to perform statistical analysis
summary statistic - ✔️✔️a single number summarizing a large amount of data
statistical significance - ✔️✔️the larger the difference we observe for a particular
sample size, the less believable it is that that difference is due to chance... ask yourself:
is the difference so large that we reject the notion that it was due to chance?
.
treatment group - ✔️✔️the participants in an experiment who are exposed to the level
of the independent variable that involves a medication, therapy, or intervention
