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.
World Population Growth
Three factors that influence the distribution of Na+ and K+ ions across the neural membrane.
World Distribution of Temperature
The population of Asia increases rapidly, the demand for food and water is also growing
How the Return to Education Affects the Distribution of Income
Population distribution patterns