Question 1
Use the t distribution to construct the confidence interval estimate of the population mean. Round the confidence interval estimates to one decimal place unless indicated otherwise.
A simple random sample of 30 households was selected from a particular neighborhood. The number of cars for each household is shown below. Construct the 95% confidence interval estimate of the population mean.
◦ 1.5 cars < μ < 1.9 cars
◦ 1.0 cars < μ < 2.0 cars
◦ 1.3 cars < μ < 1.7 cars
◦ 1.1 cars < μ < 1.9 cars
Question 2
Use the t distribution to construct the confidence interval estimate of the population mean. Round the confidence interval estimates to one decimal place unless indicated otherwise.
How tall is your average statistics classmate? To determine this, you measure the height of a simple random sample of 38 fellow students, finding a mean height of 68 inches and a standard deviation of
2.3 inches. Construct the 95% confidence interval estimate of the population mean.
◦ 68.2 in. < μ < 68.8 in.
◦ 67.2 in. < μ < 68.8 in.
◦ 67.2 in. < μ < 69.8 in.
◦ 68.2 in. < μ < 69.8 in.
School-age children are often independent and industrious, with a developing sense of self-confidenc
Hong Kong is a strange situation. A British colony since 1842, it was handed back to China in 1997 a
Population and Settlement
Population distribution (dispersion)
Population Forecasting
Construct a Lorenz curve that shows income distribution in this society.