In physical science laboratory 042 one group hypothesized that there is a relationship between the mass of a marble rolled down a ramp from a constant height and the speed of the marble at the bottom of the ramp.
Mass (g)
Speed (cm/s)
4.8
32
5.0
28
5.2
27
5.3
27
6.1
30
_________ Calculate the sample size n.
_________ Calculate the slope of the linear regression.
_________ Calculate the y-intercept of the linear regression.
_________ Calculate the correlation coefficient r for the data.
_________ Is there a relationship between mass and speed?
Why or why not?
Another group hypothesized that there is a relationship between the speed of the inbound marble to a collision with another marble and the speed of the outbound marble after the collision. The table presents their data.
speed in (cm/s)
speed out (cm/s)
0
0
24
11
38
28
46
38
71
40
_________ Calculate the slope of the linear regression.
_________ Calculate the y-intercept of the linear regression.
_________ Calculate the correlation coefficient r for the data.
_________ Is there a relationship between speed in and speed out?
In physical science 
Another group hypothesized that there is a relationship between the speed of the inbound marble to a collision with another marble and the speed of the outbound marble after the collision. The table presents their data.