b) The microstructure of the ultrafine powder of a certain type of mineral is said to be dependent on temperature. Sampl

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B The Microstructure Of The Ultrafine Powder Of A Certain Type Of Mineral Is Said To Be Dependent On Temperature Sampl 1 (64.09 KiB) Viewed 40 times

b) The microstructure of the ultrafine powder of a certain type of mineral is said to be dependent on temperature. Sample of the powder were taken and its porosity (\%) at different temperature (∘C) readings were observed. A fitted linear regression model was applied to the observations corresponding to porosity (y) and temperature (x) has resulted in the following Microsoft Excel output. 6 SSCE 2193 i. How many samples were observed for this study? (1 mark) ii. State the equation of the fitted linear regression model of porosity against temperature. Estimate the porosity of the powder at a temperature of 150∘C. (3 marks) iii. State the measured strength of relationship between porosity and temperature, and comment on the relationship. (2 marks) iv. Is there any significant evidence that the data support the existence of a linear relationship between porosity and temperature at 5% significance level? Briefly, justify your reasoning. (2 marks)