A research center claims that 31​% of adults in a certain country would travel into space on a commercial flight if they could afford it. In a random sample of 700 adults in that​ country, 35​% say that they would travel into space on a commercial flight if they could afford it. At α=0.10​, is there enough evidence to reject the research​ center's claim?

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A: Type II Error : Fail to reject H0 when H0 is false

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A: Solution

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A: The hypothesized proportion is 0.002.

Q: is there sufficient evidence to support the student-researcher’s claim? (Critical value approach)

A:

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A: We have to create 90% confidence interval for mean.

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Q: + The advertised claim for batteries for cell phones is set at 48 operating hours with proper…

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Q: A random sample of 23 bags of apples (marked as 10 pounds each) received by a large grocery chain…

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Q: A large software company gives job applicants a test of programming ability and the mean for that…

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Q: According to the American Diabetes Association (www.diabetes.org), 46.2% of Americans aged 60 years…

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