b. Sammy is studying the number of units of gas, g, and the number of units of electricity, e, used in her house each we

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B Sammy Is Studying The Number Of Units Of Gas G And The Number Of Units Of Electricity E Used In Her House Each We 1 (55.79 KiB) Viewed 110 times

b. Sammy is studying the number of units of gas, g, and the number of units of electricity, e, used in her house each week. A random sample of 10 weeks use was recorded and the data for each week were coded so that x=(-60)/4 and y=e/10. The results for the coded data are summarized below: Σε = 48.0 Σν = 58.0 y? = 312.1 0,2= 2.10 So = 18.35 i. Determine the correlation coefficient l'azie (2 marks) ii. Find the equation of the regression line of y on x in the form y = a + bx. Give the values of a and b correct to 4 decimal places. (3 marks) iii. Use your regression equation to estimate the number of units of electricity used in a week when 100 units of gas were used. (2 marks) iv. Hence, if the data was converted back to units of gas, g, and units of electricity, e, What is the likely change in the covariance? (1 mark) b. What is the likely change in the equation of the regression line? (2 marks) a. Attach File Browse local file Browse Content Collection