Demand for stereo headphones and MP3 players for joggers has caused Nina Industries to grow almost 50 percent over the p

[answerhappygod]

Demand for stereo headphones and MP3 players for joggers hascaused Nina Industries to grow almost 50 percent over the pastyear. The number of joggers continues to expand, so Nina expectsdemand for headsets to also expand, because, as yet, no safety lawshave been passed to prevent joggers from wearing them. Demand forthe players for last year was as follows:
MONTH DEMAND (UNITS) January 4,150 February 4,250 March 3,950April 4,350 May 4,950 June 4,650 July 5,250 August 4,850 September5,350 October 5,650 November 6,250 December 5,950
a. Using linear regression analysis, what would you estimatedemand to be for each month next year? (Do not round intermediatecalculations. Round your answers to 2 decimal places.)
b. To be reasonably confident of meeting demand, Nina decides touse 3 standard errors of estimate for safety. How many additionalunits should be held to meet this level of confidence? (Do notround intermediate calculations. Round your answer to the nearestwhole number.)