In a survey of 1007 parents of children ages 8 to 14, 75% say they are willing to get a second job or a part-time jobs favor their children’s college education and 45% say they lose sleep worrying about college cost. The service margin of error is 3%. What is the confidence interval for the proportion?

Q: A survey of 200,000 boat owners found that 12% of the pleasure boats were named Serenity.Find the…

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Q: A sociologist wants to construct a 94% confidence interval for the proportion of teenagers who uses…

A: Given, p=0.23 E=0.02 z value at 94% confidence is Zc=1.88 n=?

Q: In a random sample of 170 customers, 90 ordered chicken sandwiches for lunch. Construct a 94%…

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Q: In a survey of 1037 US adults ages 65 and over, 643 were concerned about getting the flu. A 99%…

A: Given,n=1037x=643p^=xnp^=6431037=0.6201-p^=1-0.620=0.380α=1-0.99=0.01α2=0.005Z0.005=2.58    (from…

Q: In general, when you increase the confidence level for a confidence interval using the same sample…

A: As confidence level increases critical value is going to increase .  Here they given sample…

Q: A poll of 5000 residents in Brazil, Canada, China, France, Malaysia, South Africa, and the United…

A: From the provided information, Sample size (n) = 5000 805 of the responses, was doctors, nurses, and…

Q: What proportion of new drivers fail the written portion of their driver's license examination? You…

A: Given Data: p=196/500=0.392   n=500   z-value corresponding to 95% Confidence level=1.96

Q: State the equation for the 95% confidence interval?

A: The equation for confidence interval can be stated as: Here x̅ is the sample mean, Zα/2 is the…

Q: you want to find out the percent of people who use an iPhone so you survey 120 random adults of whom…

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Q: n a sample of 500 Canadians, it was found that 400 people preferred apple products. In a sample of…

A: Given information is as follows; Number of Canadians, n1 = 500. Number of Canadians preferred apple…

Q: A survey of 800 women shoppers found that 17% of them shop on impulse. what is 98% confidence…

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Q: In a article you can read, among other things, that the relative risk of death was 0.70 (95%…

A: Relative risk is a ratio in epidemiology that measures risk of an event in one group to risk of the…

Q: A surprising fact indicates that a small proportion of teens use a password on their mobile device.…

A: Given data,n=120x=56p=x/n =0.47z-value at 90% confidence interval is Zc=1.645