Sorted by:    Using Linear Regression to Predict an Outcome
Statistical researchers often use a linear relationship to
predict the (average) numerical value of Y for a given value of
X using a straight line (called the [more…]  How to Calculate a
Regression Line  In statistics, you can calculate a regression
line for two variables if their scatterplot shows a linear
pattern and the correlation between the variables is very strong
[more…]  How to Interpret a Regression Line  In statistics, once
you have calculated the slope and y-intercept to form the best-
fitting regression line in a scatterplot, you can then interpret
their values. [more…]  How to Calculate a Confidence Interval
for a Population Mean When You Know Its Standard Deviation  If
you know the standard deviation for a population, then you can
calculate a confidence interval (CI) for the mean, or average,
of that population. When a statistical characteristic that’s
being measured [more…]  How to Compare Two Population
Proportions  For statistical p