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lubasha [3.4K]
4 years ago
8

Last year, the numbers of skateboards produced per day at a certain factory were normally distributed with a mean of 20,500 skat

eboards and a standard deviation of 55 skateboards. What % of the days last year did the factory produce 20,555 skateboards or fewer
Mathematics
1 answer:
Valentin [98]3 years ago
5 0
Let x be a random variable representing the number of skateboards produced
a.) P(x ≤ 20,555) = P(z ≤ (20,555 - 20,500)/55) = P(z ≤ 1) = 0.84134 = 84.1%
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