S23 - DIFFICULTY: Moderate KEYWORDS: cluster sample 3. True...

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1. True or False: The professor of a business statistics class wanted to find out the average amount of time per week her students spent studying for the class. Among the 50 students in her class, 20% were freshmen, 50% were sophomores and 30% were juniors. She decided to draw 2 students randomly from the freshmen, 5 randomly from the sophomores and 3 randomly from the juniors. This is an example of a systematic sample. ANSWER: False TYPE: TF DIFFICULTY: Moderate KEYWORDS: stratified sample 2. True or False: The professor of a business statistics class wanted to find out the average amount of time per week her students spent studying for the class. She divided the students into the left, right and center groups according to the location they sat in the class that day. One of these 3 groups was randomly selected and everyone in the group was asked the average amount of time per week he/she spent studying for the class. This is an example of a cluster sample. ANSWER: True TYPE: TF
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Unformatted text preview: DIFFICULTY: Moderate KEYWORDS: cluster sample 3. True or False: The professor of a business statistics class wanted to find out the average amount of time per week her students spent studying for the class. She divided the fifty students on her roster into ten groups, starting from the first student on the roster. The first student was randomly selected from the first group. Then every tenth student was selected from the remaining students. This is an example of a cluster sample. ANSWER: False TYPE: TF DIFFICULTY: Moderate KEYWORDS: systematic sample 4. True or False: Selection bias occurs more frequently in systematic samples than in simple random samples. ANSWER: True TYPE: TF DIFFICULTY: easy KEYWORDS: simple random sample, systematic sample 5. True or False: The question: “Have you used any form of illicit drugs over the past 2 months?” will most likely result in measurement error. ANSWER: True TYPE: TF DIFFICULTY: Moderate KEYWORDS: measurement error...
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This note was uploaded on 02/14/2011 for the course ECON 100 taught by Professor Mmm during the Spring '11 term at Allen University.

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