- #1
theIBnerd
- 13
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Hi. i keep finding a different answer than what textbook offers. is my answer correct?
question: the quality control department of a company making computer chips knows that 2% of the chips arw defective. use the nurmal approximation to the binomial probability distribution, with a continuity correction, to find the probability that, in a batch containing 1000 chips, between 20 and 30 chips (inclusive) are defective.
my answer: probability=0.02
using TI 84+
binomcdf(1000,0.02,30)-binomcdf(1000,0.02,19)=0.5179 (its my answer)
but the textbook says the answer is: 0.5349
is there anything wrong with my solution? what do you think is the real answer?
thank you
question: the quality control department of a company making computer chips knows that 2% of the chips arw defective. use the nurmal approximation to the binomial probability distribution, with a continuity correction, to find the probability that, in a batch containing 1000 chips, between 20 and 30 chips (inclusive) are defective.
my answer: probability=0.02
using TI 84+
binomcdf(1000,0.02,30)-binomcdf(1000,0.02,19)=0.5179 (its my answer)
but the textbook says the answer is: 0.5349
is there anything wrong with my solution? what do you think is the real answer?
thank you