Question
Trying to check my answers, please help A statistician is curious if the gold medal time for the women's 100 - meter freestyle depends upon
Trying to check my answers, please help
A statistician is curious if the gold medal time for the women's 100 - meter freestyle depends upon the year that the Summer Olympics took place.A sample of every other Summer Olympics for the women's 100-meter freestyle produced the following data:
Year
1912
1924
1932
1952
1960
1968
1976
1984
1992
2000
2008
Time (in seconds)
82.2
72.4
66.8
66.8
61.2
60.0
55.65
55.92
54.64
53.8
53.1
a) Find the equation of the least-squares line. Identify and interpret the slope and the y - intercept.
Slope: -0.27556; if the year is increased value of time is decreased by 0.2756 seconds
Y-intercept: 603.4304; If the year is 0, then the predicted value of time is 603.4304 seconds
b) Find the correlation coefficient and interpret.
Correlation Coefficient: -0.95112
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