ECO 251CLT TEST SOLUTIONS QUESTIONS AND CORRECT ANSWERS

ECO 251CLT TEST SOLUTIONS QUESTIONS AND CORRECT ANSWERS Sampling without replacement means that once a member of a population is chosen for a sample, it cannot be chosen again for the same sample. - ANSWER TRUE Cluster sampling is often used to test market new products. - ANSWER TRUE A convenience sample is an example of a nonprobability sample. - ANSWER TRUE An Internet poll, where individuals may respond to a survey as many times as they choose to, is an example of a nonprobability sample. - ANSWER TRUE A population mean is an example of a statistic. - ANSWER FALSE A sample median is an example of a statistic. - ANSWER TRUE Sampling error is the difference between a sample statistic and a population parameter. - ANSWER TRUE A small sample size could provide a smaller sampling error than a larger sample size when taken from the same population. - ANSWER TRUE A common source of nonsampling errors is a survey that contains ambiguous questions in the eyes of the respondent. - ANSWER TRUE We expect the average value of many sample means to be close to the population mean from which they were drawn. - ANSWER TRUE The standard error of the mean is the sample mean standard deviation, which measures the variation around the mean of the sample means. - ANSWER TRUE The sample means for a population that follows the normal distribution will also be normally distributed, regardless of the size of the samples. - ANSWER TRUE The sampling error for a census equals zero. - ANSWER TRUE The sampling distribution of the proportion describes the pattern that sample proportions tend to take on when randomly drawn from a population. - ANSWER TRUE A sample is a sample in which each member of the population has a known, nonzero, chance of being selected for the sample. A) systematic B) simple random C) probability D) convenience - ANSWER C) probability A samp