Help Save & Exit Check my 7 Demand for stereo headphones and MP3 players for joggers has caused Nina Industries to grow almost 50 percent over the past year. The number of joggers continues to expand, so Nina expects demand for headsets to also expand, because, as yet, no safety laws have been passed to prevent joggers from wearing them. Demand for the players for last year was as follows: MONTH DEMAND (UNITS) B January 4,115 points February 4, 215 March 3,915 April 4, 315 Book May 4,915 June 4, 615 Print July 5 ,215 August 4, 815 References September 5,315 October 5 , 615 November 6 , 215 December 5 , 915 a. Using linear regression analysis, what would you estimate demand to be for each month next year? (Do not round intermediate calculations. Round your answers to 2 decimal places.) Month Forecast January February March Apri M Q Search stly cloudyTopic 6 Assignment i Saved Help Save a. Using linear regression analysis, what would you estimate demand to be for each month next year? (Do not round intermediate calculations. Round your answers to 2 decimal places.) Month Forecast points January February March eBook April Print May References June July August September October November December b. To be reasonably confident of meeting demand, Nina decides to use 4 standard errors of estimate for safety. How many additional MIC Graw Hill 89.F Q Search Mostly cloudy 9Check my work Ividy June July August September points October November eBook December Print References b. To be reasonably confident of meeting demand, Nina decides to use 4 standard errors of estimate for safety. How many additional units should be held to meet this level of confidence? (Do not round intermediate calculations. Round your answer to the nearest whole number.) Additional units Mc Graw 1 89 F Q Search Mostly cloudy