Week 1 Sampling Questions and Anwers.Exam| Eelaborations| MATH 225N - Statistical Reasoning For Health Sciences

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Assume that 80 houses are present in the form of a grid consisting of 10 columns and 8 rows. If a loud speaker is placed just before the first row, which sampling method works the best to select a s... ample of houses if we want to get an estimate of the average loudness (measured in decibels) near all the 80 houses?2. Angela is studying the mean blood pressure of all students attending her college. She collects data from the 38 students in her statistics class. Which type of sampling is used?An executive for a large national restaurant chain with multiple locations in each of 513 counties wants to personally sample the cleanliness of the chain's restaurants throughout the country by visiting restaurants. The executive wants a good-quality sample but wants to minimize travel time and expenses. Which of the following sampling methods would be most appropriate?. When is using a simple random sample appropriate? Select the correct answer below: A simple random sample should always be used if possible. A simple random sample should be used if the population is not well understood or there are no groups within the population that need to be analyzed individually. A simple random sample should be used when the population has well-defined groups that are relatively homogeneous. This will make sure each group is represented proportionally [Show More]

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