mmierda Flashcards
(31 cards)
When do we use T-test?
when compearing 2 different groups
but needs to be quantitative
what is an unpaired group and to which test is it?
comparing 2 groups for example boys and girls
t test
what is an paired group and to which test is it?
it is when you are compearing 2 groups (before and after)
t-test
What is p-value
A number that tells you if the difference is real or just by chance
p value needs to be less than —- to reject null hypothesis
0.05
What does the ANOVA test do?
it checks if 3 or more groups are different
for example comparing size
When do we use the ANOVA test?
When Comparing More Than Two Groups
What is a correlation test?
It checks if two things are related. For example, checking if people’s weight is related to their height.
It checks if two things are related. For example, checking if people’s weight is related to their height.
correlation test
what is the r value and to what test is it from?
Tells you how strong the relationship is.
correlation test
how does r value work?
+1 means a strong positive relationship (the bigger one thing gets, the bigger the other gets).
0 means no relationship (one thing doesn’t affect the other).
-1 means a strong negative relationship (the bigger one thing gets, the smaller the other gets).
Graphical Representations what is it
the graphs
Column Graph
Similar to box plots but shows the average and spread in bars.
Box and Whisker Plot
Shows how spread out your data is and where the middle point is. Great for comparing different groups.
Pie Chart
Shows parts of a whole, good for comparing categories (like which fruit people like best).
A graph that shows how two things are related, like weight and height.
Scatterplot
Scatterplot
A graph that shows how two things are related, like weight and height.
Shows parts of a whole, good for comparing categories (like which fruit people like best).
Pie Chart
Similar to box plots but shows the average and spread in bars.
Column Graph
Shows how spread out your data is and where the middle point is. Great for comparing different groups.
Box and Whisker Plot
what is a Inferential Statistics
(Making Decisions Based on Data)
Independent Variable what is it?
This is the factor you change or manipulate in your experiment to see if it has an effect on something else. basicamente la causa
what does a Inferential Statistics do?
Helps you make guesses about a big group based on a small sample. For example, predicting how all students in a school might perform on a test based on a few students’ scores.
what are the variables for independent and what are the meaning of each one?
The independent variable is usually a qualitative (like categories or groups) or quantitative (like numbers, measurements) factor.
