Suppose that 20% of the people in a large city have used a hospital emergency room in the past year. If a random sample of 125 people from the city is taken, approximate the probability that at most 28 used an emergency room in the past year. Use the normal approximation to the binomial with a correction for continuity.

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Q: Suppose that 13% of the population of the U.S. is left-handed. If a random sample of 225 people from…

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Q: Suppose that 12% of the population of the U.S. is left-handed. If a random sample of 130 people from…

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A: It is given that n=70 and p=0.33.

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A: Given: n=230p=0.076 Normal approximation is used with mean μ=np and standard deviation σ=np1-p.

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A: Given,      sample size n=100                         P=12      and  nP=100×12=50>10…

Q: n a certain city of several million people, 7.8% of the adults are unemployed. If a random sample of…

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Q: The National Vaccine Information Center estimates that 90% of Americans have had chickenpox by the…

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Q: Suppose that 10% of the population of the U.S. is left-handed. If a random sample of 140 people from…

A: Answer: From the given data, sample size(n) = 140 p = 10% =0.10

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A: Solution-: Given: n=720, X=170, p=1/4=0.25 We want to find P(X≥170)=?

Q: Suppose that 13% of the people in a large city have used a hospital emergency room in the past year.…

A: The question is about normal approximation.Given :Population proportion of the people used a…

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A: Obtain the approximate probability that at least 24 have a job prior to graduation. The approximate…

Q: Suppose that 20% of the people in a large city have used a hospital emergency room in the past year.…

A: n=120p=0.20mean(μ)=npmean(μ)=120×0.20mean(μ)=24Standard deviation(σ)=np(1-p)Standard…

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Q: Suppose that the lifetimes of TV gives are normally distributed with a standard deviation of 1.2…

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Q: Use normal approximation to estimate the probability of getting more than 54 girls in 100 births.…

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A: Answer: For the given data,

Q: Suppose that 16% of the U.S. population is left handed. If a random sample of 130 people are…

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Q: Suppose that half of all students (50%) in campus dormitories are dissatisfied with the food…

A: n = 64 p = 0.5