If a hypothesis test were to be performed, in which of the following contexts would a t-test be appropriate? Select the correct answer below: A simple random sample of 29 books is taken from a public library and the lengths (pages) were collected. The sample mean is 166 pages and the population standard deviation is 27 pages. A sample mean of 30 pounds and a sample standard deviation of 5 pounds are obtained using a simple random sample of 27 dogs from the dogs within a county, which have approximately normally distributed weights. A sample mean of 31,994 dollars and a standard deviation of 4,658 dollars are obtained using a simple random sample of 22 individuals from the residents of a town having approximately normally distributed incomes. The population standard deviation is 3,959.3 dollars. A convenience sample of 16 vehicles is taken from a large group of vehicles with approximately normally distributed fuel consumption rates. The sample mean is 20 miles per gallon and the sample standard deviation is 2 miles per gallon.