MATH 225N Week 1 Sampling Questions and Answers

Assume that 80houses are present in the form of a grid consisting of 10 columns and 8 If a loud speaker is placed just before the first row, which sampling method works the best to select a sample of houses if we … want to get an estimate of the average loudness (measured in decibels) near all the 80 houses? Angela is studying the mean blood pressure of all students attending her college. She collects data from the … 38students in her statistics class. Which type of sampling is used? A town planner is interested in getting some demographic data about the households in the city. The city has four wards with the … following numbers of households: ward A has 2,107, ward B has 903, ward C has 1,505, and ward D has 1,499. The budget for the project allows the planner to survey 100 She plans to use a stratified sampling method. What number of households should be chosen from ward B? Enter a whole number. Donald is studying the eating habits of all students attending his school. He samples the population by dividing the students into … groups by grade level and randomly selecting a proportionate number of students from each group. He then collects data from the sample. Which type of sampling is used? An executive for a large national restaurant chain with multiple locations in each of 513counties 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? considering different sampling methods, stratified sampling includes the steps: _______. When is using a simple random sample appropriate? Ruby is studying the mean waist size of all students attending her college. She collects data from the 25students in her statistics class. Which type of sampling is used?