Question 1186825: 2.2 A major television manufacturer has determined that its 50-inch LED TV has a mean service
life that can be modeled by a normal distribution with a mean of 5 years and a standard
deviation of eighteen (18) months. What probability can you assign to service lives of: (Work
to 3 decimal places for final answers) (Refer to Addendum 1)
2.2.1 at least three (3) years
2.2.2 at least seven (7) years
2.2.3 Between three (3) and seven (7) years
2.2.4 Before four (4) years
2.2.5 What service period would achieve an expected wear-out rate of 65%
Answer by ikleyn(52887)   (Show Source):
You can put this solution on YOUR website! .
Go to online (free of charge) normal distribution probability calculator
https://onlinestatbook.com/2/calculators/normal_dist.html
Input the given parameters of each part into the appropriate window of the calculator and get the answers
to your questions.
The calculator has perfect description and design, so EVERY person, even beginner, may work with it on his or her own,
even having minimum knowledge on the subject.
Happy calculations ( ! )
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// I am not a promoter of this online calculator: my only wish is to teach you to do this simple job on your own,
because the level of complexity of this assignment is as 1 + 2 = 3 (even lower than 2 x 2 = 4).
Playing with this tool, you will gain all missing knowledge on the subject, which you need.
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Or, alternatively, you may use your GRAPHING CALCULATOR.
See THIS Internet source / site
https://mathbits.com/MathBits/TISection/Statistics2/normaldistribution.htm
Find there EVERYTHING you need to know in clear and compact form
to solve this problem (and thousand other) similar and different problems ON YOUR OWN.
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