Stats Ch. 8 Exam Questions Correctly Answered 2024.

Stats Ch. 8 Exam Questions Correctly Answered 2024. it is quicker - CORRECT ANSWER To study the population of consumer perceptions of new technology, sampling of the population is preferred over surveying the population because _________. cars are destroyed - CORRECT ANSWER When testing the safety of cars using crash tests, a sample of one or two cars is used because ___________. 100 - CORRECT ANSWER A marketing firm is studying consumer preferences for winter fashions in four different months. From a population of women 18 to 21 years of age, a random sample of 100 women was selected in January. Another random sample of 100 women was selected in March. Another random sample of 100 women was selected in June. Another random sample of 100 women was selected in September. What is the sample size? 4 - CORRECT ANSWER A marketing firm is studying consumer preferences for winter fashions in four different months. From a population of women 18 to 21 years of age, a random sample of 100 women was selected in January. Another random sample of 100 women was selected in March. Another random sample of 100 women was selected in June. Another random sample of 100 women was selected in September. What is the number of samples? simple random sampling - CORRECT ANSWER When all the items in a population have an equal chance of being selected for a sample, the process is called _________________. sampling error - CORRECT ANSWER What is the difference between a sample mean and the population mean called? systematic - CORRECT ANSWER Suppose we select every fifth invoice in a file. What type of sampling is this? the population mean - CORRECT ANSWER All possible samples of size n are selected from a population and the mean of each sample is determined. What is the mean of the sample means? Stratified random sampling - CORRECT ANSWER When dividing a population into subgroups so that a random sample from each subgroup can be collected, what type of sampling is used? µ is unknown - CORRECT ANSWER The true sampling error is usually not known because ________. inversely related to the sample size—in other words, the larger the sample size, the smaller the sampling error - CORRECT ANSWER The size of the sampling error is ________. µ - CORRECT ANSWER The mean of all the sample means is _______. Equal to the population mean µ - CORRECT ANSWER For a given population, the mean of all the sample means of sample size n, and the mean of all (N) population observations (X) are _______.