Classifying samples Emmanuel (a) A consultant wants to ask workers at a factory about the workers' job satisfaction. Which of the following best describes a random sample of workers? O The consultant assigns each worker a different number. Using a random number table, he draws 78 of those numbers at random. Then, the consultant selects the workers assigned to the drawn numbers. Every set of 78 workers is equally likely to be drawn using the random number table. O All of the workers on the second floor of the factory building are easily accessible. So, the consultant selects the first 78 workers from the second floor to arrive at work on a particular day. O The consultant forms 6 groups of workers based on the workers' shifts. Then, he selects 13 workers at random from each group. Aa (b) A manager at a bus company wants to survey employees about the new uniforms. Which of the following best describes a cluster sample of employees? O The manager forms groups of 20 employees based on the departments the employees are in. Then, she selects all of the employees in 4 randomly chosen groups. O The manager uses a computer program to draw 80 employees at random and selects these employees. Every set of 80 employees is equally likely to be drawn by the computer program. th O The manager takes a list of the employees and selects every 4 employee until 80 employees are selected. (c) A bank analyst wants to ask customers who have a mortgage with the bank about the customers' home-buying experiences. Which of the following best describes a stratified sample of customers? th O The analyst takes a list of the customers and selects every 5 customer until 90 customers are selected. The analyst forms groups of 30 customers based on the cities the customers live in. Then, she selects all of the customers in 3 randomly chosen groups. O The analyst forms 5 groups of customers based on the customers" mortgage amounts. Then, she selects 18 customers at random from each group. Activate Wine Go to Settings to Explanation Check O 2020 McGraw-Hill Education. All Rights Reserved. Terms of Use Privacy Accessibility 0 Type here to search