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In a Harris Interactive survey of 1006 adults, 86% say that they wash their hands after using a public restroom; the margin of error is 3 percentage points. USA Today reported that among 6028 adults observed in restrooms, 85% washed their hands; the margin of error is 1 percentage point. Use the given statistics and margin of error to identify the confidence interval for each study. Which study do you believe, and why?
construct a contingency table for the relationship between degree of anger and the incidence of heart disease.- Among those with no anger symptoms, what percentage had coronary heart disease?
A transportation company wants to estimate the average length of time goods are in transit across the country. A random sample of 20 shipments gives x = 2.6 days and s = 0.4 day. Give a 99% con?dence interval for the average transit time.
a random sample of 6 music majors playing song s counted the number of mistakes each made. then these musicians played
Construct a 90% confidence interval estimate of the proportion of adults whose favorite fruit is banana. Show all work. Just the answer
how large of a sample size do we need to estimate the mean annual income of native americans in onondaga county new
An advertiser of a certain brand of aspirin (let's call it Brand B) claims that it is the preferred painkiller for headaches, based on the results of a survey.
What are the possible values of X? Give them as a comma-separated list in increasing order. And what are their probabilities?
Does the regression support the claim that on average, employees with longer tenure at the company are more satisfied with their job, holding salaries and gender fixed? Use a 5% significance level.
CCI is unable to adjust the mean of the filling process. However, it is able to adjust the standard deviation of the filling process.
You want to estimate the true proportion of college students on your campus who voted in the 2016 presidential election with 95% confidence and a margin
listed below are speeds mih measured from southbound traffic on i-280 near cupertino california based on data from
How can stretch goals be a good fit for this generation of college students when they enter the workplace.
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