Estimate a population proportion
Suppose you want to estimate a population proportion, p and p = 0.35, N=5,600, and n= 1,800. Find an approximate 95% confidence interval for p.
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Is the relative frequency of the ammonia level skewed to the right?
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Electrical engineers recognize that high neutral current in computer power system is a potential problem. A recent survey of computer power system load currents a U.S.sites found that 10% of the sites had high neutral to full-load current ratios.
On the basis of these figures, a friend claims that the Right-to-Work laws are costing the average worker 50 cents per hour. Do you think this claim is justified? Assume a 5% level of significance.
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The athletic director claims that the attendance is the same as last year. If a = .05, what are the critical values for this two-tailed t test?
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