Question

Find the mean and standard deviation of the times and icicle lengths for the data on run 8903 in data data449.dat. Find the correlation between the two variables. Use these five numbers to find the equation of the regression line for predicting length from time. Use the same five numbers to find the equation of the regression line for predicting the time an icicle has been growing from its length. (Round your answers to three decimal places.)

time    length
10      1.6
20      3
30      4.2
40      4.7
50      7.5
60      11
70      10.8
80      13
90      13.7
100     17.1
110     15.9
120     19.1
130     21.6
140     22.7
150     25.8
160     25.8
170     27.5
180     30.2

times x =

times s =

lengths x =

lengths s =

r =

time = + length

length = + time

Answer 1