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 January February March April May June July August September October November December Month (Algo) January February 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.) March April May June July August September October DEMAND (UNITS) 4,115 4,215 3,915 4,315 4,915 4,615 5,215 Answer is complete but not entirely correct. Forecast 6,181.67 6.373.97 November December 4,815 5,315 5,615 6,215 5,915 6,566.28✔✔ 6,658.59 X 6,950.89 7,143.21 7,355.21 7,527.82 7,720.13 7,912.44 8,104.74 8,297.05 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.)
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 January February March April May June July August September October November December Month (Algo) January February 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.) March April May June July August September October DEMAND (UNITS) 4,115 4,215 3,915 4,315 4,915 4,615 5,215 Answer is complete but not entirely correct. Forecast 6,181.67 6.373.97 November December 4,815 5,315 5,615 6,215 5,915 6,566.28✔✔ 6,658.59 X 6,950.89 7,143.21 7,355.21 7,527.82 7,720.13 7,912.44 8,104.74 8,297.05 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.)
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Problem 18-14 (Algo)
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
January
February
March
April
May
June
July
August
September
October
November
December
Month
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.)
January
February
Answer is complete but not entirely correct.
Forecast
6,181.67
6,373.97
6,566.28
6,658.59 x
6,950.89
7,143.21✔
March
April
May
June
DEMAND (UNITS)
4,115
4,215
3,915
4,315
July
August
September
October
4,915
4,615
5,215
November
December
4,815
5,315
5,615
6,215
5,915
7,355.21 X
7,527.82
7,720.13
7,912.44✔
8,104.74✔✔
8,297.05
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.)
Answer is complete but not entirely correct.
Additional
units
2,912,821
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