Suppose a brand of light bulbs is normally distributed, with a mean life of 1800hr and a standard deviation of 100hr.
Suppose a brand of light bulbs is normally distributed, with a mean life of 1800hr and a standard deviation of 100hr.z
Find the probability that a light bulb of that brand lasts between 1680hr and 1950hr.
zAzA1.00.34131.50.43321.10.36431.60.44521.20.38491.70.45541.30.40321.80.46411.40.41921.90.4713
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