1a -0.235
2a mode=23
b median=22
c IQR=3
d mean=22.4 standard deviation=6.37
e new mean=23.9
3a 2.27x+4.17
b the same at aproximately 28 degrees centigrade
From here on I can't remember the questions really! So...
0.3031 0.880 0.292 0.89 0.212, 0.629 , 0.953, 0.372, 0.156,0.110, 0.15, 0.492, 0.719, 22, 17.4
confidence interval (5.02,5.08)