Two Way Tables
Scatter Plots
Correlation
Linear Regression
Calc Skillz
100
How many males like basketball?
15
100
How many beach visitors were there when it was 84 degrees?
225
100
When is a correlation coefficient considered to be strong?
When it is close to -1 or 1.
100
What is another name for the linear regression line?
Line of best fit
100
How do you turn a fraction into a percentage?
CTRL and Enter (Turn to decimal)
* 100
200
Finish the two way table:
M F Total
Can Swim 26 23 49
Can't Swim 4 27 31
Total 30 50 80
200
What can you conclude from this scatterplot?
A person's bodyweight has no correlation with their income
200
Organize the following statements into two groups, causal and non-causal:
a) I stub my toe and say "ow".
b) It is cloudy and the weatherman says it will rain.
c) A man goes to work and his children receive toys.
d) Winter jacket sales and heating bill.
Causal: A, B
Non-Causal: C, D
200
What does the linear regression line tell us?
The approximate trend of data
200
Where did Mr. Beilinson go to college?
SUNY Oswego
300
Put the following percentage in a sentence: 55% (from 12/22)
55% of chocolate lovers like soccer.
300
What temperature can you expect it to be if you hear 20 chirps
~52 degrees
300
How would you describe this correlation (Strong or weak? Negative or positive?)
Strong Negative
300
A data set has a linear regression line of y = 24x + 15
Is this a positive or negative correlation? How do you know?
Positive
Because of the positive slope
300
How do you find the correlation coefficient after inputting data?
Menu
Statistics 4
Stat Calculations 1
Linear Regression (mx + b)
Look for r
400
What percent of females drive sports cars?
25%
400
How can you tell if a scatter plot has a strong correlation?
If the dots follow a specific trend (linear increase/decrease)
400
Find the correlation coefficient of this data, rounded to the nearest hundredth. Describe the strength (weak/strong & negative/positive)
r = 0.92
Strong positive
400
Find the linear regression equation (round all coefficients to the nearest integer).
y = 11x + 64
400
How do you find the linear regression line after inputting data?
Menu
Statistics 4
Stat Calculations 1
Linear Regression (mx + b)
Plug in m and b into y = mx + b
500
There are 300 shapes. 3/4 of them are stars. Of the rhombuses, 60 are red. Of the stars, 80% are yellow. Complete the two-way table
60 45 105
15 180 195
75 225 300
500
Sketch a scatter plot that represents the amount of time a student studies (x) and the grade on their test (y)
500
Define a causal relationship
When one variable directly influences or causes a change in another variable.
500
Data is collected about how average rainfall per month (x), in inches, affects jacket sales for that month (y).
The linear regression line is y = 12x + 27
What does 12 represent in this situation?
For each additional inch of rain, there are 12 more jackets sold.
500
What state did Mr. Beillinson grow up in?
Connecticut