Question

(b) A chemist at a pharmaceutical company wants to test the quality of a new batch of microscopes. Which of the following best describes a convenience sample of microscopes? The microscopes in the first shipment that was received are easily accessible. So, he selects all 72 of the microscopes in this shipment. The chemist assigns each microscope a different number. Using a random number table, he draws 72 of those numbers at random. Then, he selects the microscopes assigned to the drawn numbers. Every set of 72 microscopes is equally likely to be drawn using the random number table. The chemist takes a list of the microscopes and selects every \( 3^{\text {rd }} \) microscope until 72 microscopes are selected. (c) A manager at a bus company wants to survey employees about the new uniforms. Which of the following best describes a stratified sample of employees? The manager asks for volunteers and selects every volunteer until 64 employees are selected. She selects the volunteers because these employees are easily accessible. The manager forms groups of 8 employees based on the departments the employees are in. Then, she selects all of the employees in 8 randomly chosen groups. The manager forms 4 groups of employees based on the departments the employees are in. Then, she selects 16 employees at random from each group.

          (b) A chemist at a pharmaceutical company wants to test the quality of a new batch of microscopes. Which of the following best describes a convenience sample of microscopes?
The microscopes in the first shipment that was received are easily accessible. So, he selects all 72 of the microscopes in this shipment.
The chemist assigns each microscope a different number. Using a random number table, he draws 72 of those numbers at random. Then, he selects the microscopes assigned to the drawn numbers. Every set of 72 microscopes is equally likely to be drawn using the random number table.
The chemist takes a list of the microscopes and selects every \( 3^{\text {rd }} \) microscope until 72 microscopes are selected.
(c) A manager at a bus company wants to survey employees about the new uniforms. Which of the following best describes a stratified sample of employees?
The manager asks for volunteers and selects every volunteer until 64 employees are selected. She selects the volunteers because these employees are easily accessible.
The manager forms groups of 8 employees based on the departments the employees are in. Then, she selects all of the employees in 8 randomly chosen groups.
The manager forms 4 groups of employees based on the departments the employees are in. Then, she selects 16 employees at random from each group.

(b) A chemist at a pharmaceutical company wants to test the quality of a new batch of microscopes. Which of the following best describes a convenience sample of microscopes?
The microscopes in the first shipment that was received are easily accessible. So, he selects all 72 of the microscopes in this shipment.
The chemist assigns each microscope a different number. Using a random number table, he draws 72 of those numbers at random. Then, he selects the microscopes assigned to the drawn numbers. Every set of 72 microscopes is equally likely to be drawn using the random number table.
The chemist takes a list of the microscopes and selects every 3^rd microscope until 72 microscopes are selected.
(c) A manager at a bus company wants to survey employees about the new uniforms. Which of the following best describes a stratified sample of employees?
The manager asks for volunteers and selects every volunteer until 64 employees are selected. She selects the volunteers because these employees are easily accessible.
The manager forms groups of 8 employees based on the departments the employees are in. Then, she selects all of the employees in 8 randomly chosen groups.
The manager forms 4 groups of employees based on the departments the employees are in. Then, she selects 16 employees at random from each group.

Added by Margaret A.

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