Statistics
What is an example of a quantitative variable?
What is a correlation?
Correlation is used to determine the strength of the linear relationship between two different variables (X and Y).
Why do we model data using linear regressions?
To make predictions based on data sets.
What are the 3 most common measures of variability that we have learned about?
Range, standard deviation, and IQR
What is Ms. H's middle name?
points for getting the letter it starts with
Jean
What is an example of categorical data?
What is the possible range of the correlation variable, r?
-1 to 1
What is the linear regression formula you type in Desmos?
y1~a+bx1
What does central tendency measure?
Central tendency measures attempt to describe a whole set of data with a single value that represents the middle or center of its distribution.
What year did Ms. H graduate high school?
(must be within 2 years)
2002
What is statistics used for?
Statistics is a set of tools and techniques used for describing, organizing, and interpreting information or data.
What would r be if there was no linear relationship between x and y?
0
The slope of a linear regression is 5.6
The explanatory variable is the hours studied
The response variable are points on a test
Explain the slope in context
For every 1 hour studied, the points scored on a test increases by 5.6
How do you find outliers?
Median + or - 1.5(IQR)
What is Ms. H's son's name?
Kiran
What is one type of graph you can use for categorical data?
Bar chart, Pie Chart, Dot Plot, etc.
Which is a stronger relationship? r=-.78 or r=0.78
They are equal! One is a negative relationship, the other is positive!
The P value determines the probability.
What does standard deviation represent?
Standard deviation represents the average amount of variability in a set of scores. How far you are away from the mean!
What did Ms. H major in?
(points for getting the right field)
Civil Engineering
What are the 3 measures of center?
Mean, Median, Mode
What is coefficient of determination?
The percentage of variance in one variable that is
accounted for by the variance in the other variable.
What is a residual?
The distance a point is from the regression line.
What is a z score?
It tells you how many standard deviations away from the mean you are.
What is Ms. H's favorite number?
6