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工作学习 / 求学深造 / Haley's Manufacturing makes fishing reels. Unfortunately, 3% of the reels are defective. Haley's has just received and order for 800 reels from massey Sporting Goods.
Do u know how to do the following questions?a) What is the probability that more than 25 reels are defective?
b) What is the probabilty that between 15 adn 20 reels (inclusive) are defective?
-farmer(农夫);
2001-10-1
{149}
(#214328@0)
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Try to find a Basic Statistics book to get some formula.In a bell shape, the middle point is 24 (=800X3%). With the formula, calculate the the value of one standard deviation, and then you can get the probabilities you need.
-april(霏);
2001-10-1
{169}
(#214350@0)