Correlations (Situation)
Outliers and Predictions
Correlations (graphs)
Reading & Creating Scatterplots 300 is a 2 way table
100
Hours of exercise and weight loss.
positive
100
What is an outlier?
What is a point that is distant from the rest of the data?
100
What type of correlation does this graph show?
What is positive?
100
What are the two best points could you use to determine the line of best fit?
What is (16,300) and (22,500)
200
Temperature outside and amount of sno-cones sold
positive
200
Which point is the outlier?
What is approximately (30, 6000)?
200
What type of correlation is shown in the scatter plot?
What is negative?
200
Estimate the y-intercept of this graph
5 or 5.5
300
Temperature outside and number of pets
no
300
Based on the scatter plot how many CDs would be sold for 2 jars of jam?
What is about 15 CDs?
300
What type of correlation is shown?
What is no correlation?
300
Bonus Question 1000 Points. Create a Two way table from the following information.
307 students were surveyed about their favorite type of music and their favorite type of movie. A total of 98 students favorite type of movie is sports. 72 students liked action movies and country music. 12 students liked comedy and R&B music. 65 students overall liked oldies music. 80 students liked country music and sports movies. 104 students prefer action movies. 13 students liked sports movies and oldies music. Only 27 students had taste and like R&B music
5 80 13 98
10 72 22 104
12 63 30 105
27 215 65 307
400
Time spent doing homework and number of missing assignments.
negative
400
If a person is 45 years old, based on the scatter plot, what should they expect their income to be?
What is about 45,000.
400
Create a scatter plot that has a strong positive correlation.
Answers may vary.
400
Explain what this graph is about.
500
Number of visitors to a water park and temperature.
positive
500
The equation for the following line of best fit is y=-4x+80. Using your equation, determine the resting heart rate of someone who exercises 4.5 hours each week.
62 beats per minute
500
Create a scatter plot that has a negative weak correlation.
Answers may vary.
500
What does the point (30,195) mean on this graph in the story?
30 pizzas sold earns $195.