Data Mining and machine Learning

Question 5 Not yet answered Marked out of 1.00 Flag question Question text True/False: The snowflake schema differs from the star schema in that the table holding the dimensional data are normalized. Select one: True False Question 6 Not yet answered Marked out of 1.00 Flag question Question text The income of a company that produces disaster equipment has been expressed as a linear regression model based upon the input variable which is the number of hurricanes projected for the upcoming hurricane season. The model is express as Y = mX + b where Y is the estimated sales in millions of dollars, m = .67 and b = 8.2. Assuming that the weather service is predicting 12 hurricanes during the season what are the sales in millions of dollars expected to be? Answer: Question 7 Not yet answered Marked out of 1.00 Flag question Question text The sales of a company (in million dollars) for each year are shown in the table below, identify the linear regression model in the form y=mx+b and report the values of m (slope) and b (intercept) as well as the estimated value of y when the value of x is 10. x (year) 2005 2006 2007 2008 2009 y (sales) 12 19 29 37 45

NOTE: You should consider the value x as the elapsed time. For 2005 this would be 0 years, for 2006 it would be 1 year and for 2012 it would be 7 years. What is the value of b? Answer: