Question

Temp & Yield	r =	0.0008925
Stirring & Yield	r =	0.7706511
Temp & Stirring	r =	0.0000000

b) Do these data provide good evidence that the yield is unaffected by temperature, within the range of the data? Or might the result be due to confounding? Explain.

c) Do these data provide good evidence that increasing the stirring rate causes the yield to increase, within the range of the data? Or might the result be due to confounding? Explain.

Answer 1

Ans b ) since the coefficient of correlation (r) between temperature and yield is 0.001 which represent that there is no correlation between yield and temperature so the data provide good evidence that  the yield is unaffected by temperature

Ans c ) since the coefficient of correlation (r) between stirring and yield is 0.771 which is strong and positive , it tells us that there is strong correlation between stirring rate and yield . yes data provide good evidence that  increasing the stirring rate causes the yield to increase