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A reliable revenue stream for cities is parking meters. A random sample of 81 parking meters yielded a sample mean of $120 with a sample standard...
A reliable revenue stream for cities is parking meters. A random sample of 81 parking meters yielded a sample mean of $120 with a sample standard deviation of $36. We want to find a 95% confidence interval for the population mean.Find the appropriate t-value to use: tc= ?Find the point estimate for the mean?Find the margin of error ?what are the lower and upper bounds of the confidence interval?
6857872 Given n = 81 =120 s=36 T=( – )Since n is large we can use normal approximationP(mod t <So )= = 1.96 95% confidence interval= (112.1,127.86)is an unbiased estimate ofPoint...