Assuming a normal distribution
a) how many lamps will fall before 900 hours
b) how many lamps will fall between 950 and 1025
c)what is proportional will fall between 950 and 980
A batch of 5000 electric lamps has been a mean of 1000 hours and a standard deviation of 75 hours.
- Posted:
- 3+ months ago by 0712030019
- Topics:
- fall, lamp, hour, electric, standard, distribution, normal, standard deviation
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