December 8, 2013
Wisly Pericles Jr.
401 Pleasant St.
Malden, MA 02148
Beebe School Department of Education
Dear, business Owner,
I am a student from the Beebe school in Malden, near the Malden center
Itzel Richard
The Catcher in the Rye Essay
The Catcher in the Rye, a novel by J.D. Salinger, portrays childhood as times graced by
innocence and naivety by contrasting it with adulthood which the narr
Plot the Data

Always start off with boxplots when comparing groups
Comparing Two Means

For independent random variables, the variance of their difference is the sum of their
individual variances,
Comparing Two Proportions
Comparisons between two percentages are much more common than questions about
isolated percentages. And they are more interesting.
Example: We often want to know how two gr
Scatterplots, Association, and Correlation
Scatter Plots may be the most common displays for data. By just looking at them, you
can see patterns, trends, relationships, and even the occasional extraor
The Null
One good way to identify both the null and alternative hypotheses is to think about the
Why of the situation.
To write a null hypothesis, you cant just choose any parameter value you like. Th
Regression Wisdom


Linear regression only works for linear models
curved relationship between two variables might not be apparent when looking at
a scatterplot alone, but will be more obvious in a
Inferences About Means

When a random sample is drawn from any population with mean u and standard
deviation o~, its sample mean y, has a sampling distribution with the same mean but
whose standard d
Inferences for Regression
In regression, we want to model the relationship between two quantitative variables, one
the predictor and the other the response
Population and the Sample
If we had all the
Linear Regression
The linear model is just an equation of a straight line through the data.
Residuals
We call the estimate made from a model the predicted value, and write it as ( yhat) to
distinguis
Paired Data: Data are paired when the observations are collected in pairs or the observations
in one group are naturally related to observations in the other.

Focus on the difference of the means be