Question

Find the mean and standard deviation of the times and icicle lengths for the data on run 8903 in data data234.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.)

times x =
times s =
lengths x =
lengths s =
r =
time =	+  length
length =	+  time

time    length
10           2.5
20           1.9
30           3.8
40           5.4
50           6.4
60          10.1
70          9.5
80          12.1
90          14.1
100         13.9
110         18.9
120         19.1
130         21.5
140         23.3
150         26.5
160         28.2
170         29.6
180         28.8

Answer 1

from above:

times x = 95.000

times s =53.385

lengths x =15.311

lengths s =9.504

r =0.992

time =9.651+5.574*length

length =-1.473+0.177*time