22: DESCRIPTIVE STATISTICS Classifying samples V A facilities supervisor at a sports stadium wants to rate the condition of the seats at the stadium. which of the following best describes a convenience sample of seats? The supervisor forms groups of 8 seats based on the sections the seats are in. Then, she selects all of the seats in 9 randomly chosen groups. All of the seats in the VIP section are easily accessible. So, the supervisor selects the 72 seats in this section. The supervisor takes a list of the seats and selects every 3rd seat until 72 seats are selected. 5. botanist at a nursery wants to inspect the health of the plants at the nursery. which of the following best describes a random sample of plants? The botanist assigns each plant a different number. Using a random number table, he draws 50 of those numbers at random. Then, he selects the plants assigned to the drawn numbers. Every set of 50 plants is equally likely to be drawn using the random number table. The botanist forms 2 groups of plants based on the ages of the plants (in months). Then, he selects 25 plants at random from each group. All of the plants that are in one particular room at the nursery are easily accessible. So, the botanist selects the 50 plants in this particular room. A chemist at a pharmaceutical company wants to test the quality of a new batch of microscopes. which of the following best describes a systematlc sample of microscopes? The chemist assigns each microscope a different number. Using a random number table, he draws 64 of those numbers at random. Then, he selects the microscopes assigned to the drawn numbers. Every set of 64 microscopes is equally likely to be drawn using the random number table. The chemist forms 4 groups of microscopes based on the prices of the microscopes. Then, he selects 16 microscopes at random from each group. The chemist takes a list of the microscopes and selects every 4111 microscope until 64 microscopes are selected