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prince96
23.10.2020 •
Mathematics
A new phone from Company M will last on average 2.7 years before dying and needing major repair or replacement if well taken care of with a standard deviation of 0.8 years. What is the probability that a phone will need replacement before 1.5 years (if taken care of!)
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Ответ:
0.067
Step-by-step explanation:
Given that :
Average years for which phone will last (m) = 2.7 years
Standard deviation (σ) = 0.8 years
Probability that phone will need replacement before 1.5 years
X = 1.5
Find the Zscore :
Zscore = (x - m) / σ
Zscore = (1.5 - 2.7) / 0.8
Zscore = - 1 2 / 0.8
Zscore = - 1.5
Hence ;
P(Z < - 1.5) = 0.066807 (from z probability calculator)
= 0.067
Ответ:
its a linear or linear function if you will
Step-by-step explanation: