In 2007, Consumer Reports published the results of an investigation of broiler c

Question

In 2007, Consumer Reports published the results of an investigation of broiler chickens purchased at stores in 23 states. Testing for bacterial contamination revealed that 81% of the chickens contained campylobacter, 15% had salmonella, and 13% had both. If we select two broiler chickens at random, what's the probability that both are contaminated with salmonella? 2.25% 65.6% 13%. 30%. Here's the probability model developed from male responses to the General Social Survey question "What's the ideal number of children for a family?" Ideal Number Probability What's the expected value for the ideal number of children for males? 2.38 2.0 2.42 1.0 A machine automatically fills boxes of cereal at a manufacturing company. The machine is set to put an average of 24.4 ounces in each box. There is variability in the filling process with a standard deviation ounces. Assuming the box weights follow a normal model, what's the chance of a randomly selected box weighing less than 24 ounces? 16%. 0.15% 32 2.5%

Explanation / Answer

23.

Here' the answer to the question:

P(X<24)

= P(Z< (24-24.4)/.4)

= P(Z<-1)

= .1587

or 16% to approximate

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