BADB 1014 final B Q4

QUESTION 4 Disk drives have been getting larger. Their capacity is now often given in terabytes (TB) where 1 TB = 1000 gigabytes, or about a trillion bytes. A survey of prices for externa disk drives found the following data: Capacity (in TB) Price (in RM) 0.50 219 0.75 238 0.50 196 1.00 245 0.75 229 2.00 385 2.00 412 1.00 269 6.00 1039 3.00 549 1.00 252 6.00 1060 i) Calculate the Pearson Product Moment correlation coefficient between capacity and prices of the external disk drive. Comment on the relationship between the two variables. (5 Marks) ii) What are the values of Y-intercept, a and the slope, b? Write the equation of the regression line that best fits the data. (4 Marks) iii) Calculate the coefficient of determination and explain its meaning in the context of this data. (2 Marks) iv) Estimate the price of a 4.0 TB disk. (2 Marks) V) You have found a 4.0 TB drive for RM700. Is this a good buy? How much you save compared to what you expected to pay? (2 Marks) [Total: 15 Marks]