Before premiering a blockbuster movie at a theater, test screenings are done beforehand. A small number of selected theaters are chosen geographically throughout the country.
Each theater chosen is supposed to be representative of theatergoers in that area. Everyone is interviewed when the movie is over. Identify the type of sampling used in this example.
A) Stratified sampling B) Systematic sampling
C) Cluster sampling D) Attempted census
Question 2
A company which designs sports shoes has made an improvement to their popular running shoe. They hope that athletes wearing the new running shoe will be able to run faster over short distances.
They will use a paired sample to determine whether the mean time to run 100 meters for sprinters wearing the new running shoe is less than the mean time to run the 100 meters for sprinters wearing the old running shoe. Identify the variable for the proposed hypothesis test.
A) Type of sports shoe worn B) Type of athlete
C) Distance run D) Time to run 100 meters
Small Copper
Drawer Test
Pulmonary function test: spirometry. (a) Normal respiratory volumes, as measured during spirometry.
Measuring the Head Circumference of an Infant or Small Child
A typical 12 volt test light.
Muscle action in the small intestine