NAME:
 
 

Below is a scatterplot of 330 observations collected (one per day) in 1976 in Upland, CA. The observations are temperature (degrees Farenheit) and Ozone levels (in parts per million or ppm.)

1. In words, describe the relationship between temperature and ozone.
 
 
 
 
 
 

2. Here are some summary statistics from ARC for this data set:

Data set = Upland, Summary Statistics

Variable N Average Std. Dev Minimum Median Maximum

Ozone 330 11.776 8.0113 1. 10. 38.

Temperature 330 61.755 14.459 25. 62. 93.

Data set = Upland, Sample Correlations

Ozone 1.0000 0.7807

Temperature 0.7807 1.0000

Ozone Temper
 
 

The regression line is yhat = -14.9375 + .432571x, where x is temperature and y is ozone.

a) Graph this line on the scatterplot

b) Interpret the regression line. Tell me everything you can about what this regression line tells us about the relationship between temperature and ozone levels.
 
 

SOLUTION