A state auditor is given an assignment to choose and audit 26 companies. She lis

Question

A state auditor is given an assignment to choose and audit 26 companies. She lists all companies whose name begins with A, assigns each a number, and uses a random number generator to select one of the numbers, and thus one company. She proceeds to use the same procedure for each letter of the alphabet and then combines the 26 results into a group for auditing. Which of the following statements are true? I. Her procedure makes use of chance. II. Her procedure results in a simple random sample. III. Each company has an equal probability of being selected. A. I only B. I and II C. I and III D. I, II, and III E. None of the above A researcher planning a survey of heads of households in a particular state has census lists for each of the 23 counties in that state. He plans to obtain a random sample from each of the counties rather than grouping all census lists together and obtaining a sample from the entire group. Which of the following statements about the resulting stratified sample are true? I. It is not a simple random sample. II. It will help to avoid samples that do not represent the population. III. It provides comparative information that a simple random sample would not provide. A. I only B. I and II C. I and III D. I, II, and III E. None of the above

Explanation / Answer

Dear student, I am only answering the first question as per Chegg Guidelines, kindly post only one question at a time.

14.

The sample obtained is not a simple random sample, and each observation does not have an equal chance of being selected because if there are 12 companies starting from A and 21 companies starting from B, the first set of companies have a greater chance of being selected than the second set.

so the answer is only by chance.

A. I only

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