Question: For each of the following examples, identify the sampling method and give reasons for your choice. (a). A lawn care firm surveys a sample of

For each of the following examples, identify the sampling method and give reasons for your choice.

(a). A lawn care firm surveys a sample of its customers on their levels of satisfaction with the firm. Each client in the firm's database is assigned a random number using Excel's random number generator. The clients are sorted in ascending order based on their random numbers, and the first 100 customers in the ordered array are included in the sample.

(b). In a study of large firms, firms with annual sales of at least $250 million are divided into three groups based on their levels of diversification. A simple random sample is taken from each group, and data are collected on each firm in the sample.

(c). A customer arriving at a bank's drive-through window is randomly selected. Then every fifth customer using the drive-through after the first one is included in the sample until the desired sample size is attained.

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