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You have probably seen the mall interviewer, clipboard in hand, approaching people passing by. To estimate the mean amount of money that city residents plan
You have probably seen the mall interviewer, clipboard in hand, approaching people passing by. To estimate the mean amount of money that city residents plan to spend on holiday gifts, the interviewer surveys 100 mall shoppers. This sampling method (convenience sampling) is biased because the people at the mall are there to spend money. As a result, the mean amount reported by the people in the sample is likely greater than the mean amount that all city residents plan to spend. Explain how to avoid the bias described in the problem. Instead of sampling at the mall, the interviewer could obtain a list of all city residents and [56'3\"] V from this list to be surveyed. If l 56'6\"] V is used instead of convenience sampling, no personal choice is involved and the sample should be [Select] v representative of all city residents. l_?*' Question 2 2 pts Sammy wants to know what percent of students at her high school have a driver's license. She surveys all students in her statistics class and nds that 68% of the students in her sample have a driver's license. What type of sample did Sammy obtain? 0 A random sample 0 Convenience sample 0 Voluntary response sample 0 A census l: Question 4 2 pts Chris is the president of an environmental club at his school. To advertise, he posts yers around campus that ask, \"Should the school ban the sale of plastic water bottles on campus? Make your voice heard Wednesdays at lunch in room 502.\" At the next meeting, he polls those in attendance and nds that 80% of students want to ban the sale of plastic water bottles on campus. What type of sample did Chris obtain? 0 Voluntary response sample 0 A census 0 Convenience sample 0 A random sample l: Question 5 2 pts Many websites include customer reviews of products, restaurants, hotels, and so on. The manager of a hotel was upset to see that 26% of reviewers on a travel website gave the hotel a \"1 star\" ratingthe lowest possible rating. Explain why this sampling method is biased. O The sampling method (convenience sampling) is biased because this is an observational study. 0 The sampling method (voluntary response sampling) is biased because this is an observational study. 0 This sampling method (voluntary response sampling) is biased because it is likely that the customers that chose to leave reviews feel strongly about the hotel, often due to a bad expenence. O This sampling method (convenience sampling) is biased because it is likely that the customers that chose to leave reviews feel strongly about the hotel, often due to a bad expenence
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