1. Which cannot be classified as ordinal scale?* A .Likert scale B. Satisfaction of customers as not satisfied, satisfied, very satisfied C. Movie ratings D. Gender 2. Marina sampled every 7th member of the population in her studies, What type of sampling would she be using?" A. Random B. Systematic C. Stratified D. Cluster

1. Which cannot be classified as ordinal scale?* A .Likert scale B. Satisfaction of customers as not satisfied, satisfied, very satisfied C. Movie ratings D. Gender 2. Marina sampled every 7th member of the population in her studies, What type of sampling would she be using?" A. Random B. Systematic C. Stratified D. Cluster

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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AS2. NO1. DATA ANALYSIS
1. You want to know the number of fans at the Miami Dolphins and Dallas Cowboys game that think the Dolphins will win. You survey 50 fans with season tickets for the Dolphins. a. What is the population of your survey? b. What is the sample of your survey? c. Is the sample biased or unbiased? Explain.
Item 2
Identify the sampling techniques used, and discuss potential sources of bias (if any). Explain. Assume the population of interest is the student body at a university. Questioning students as they leave a university library, a researcher asks 363 students about their drinking habits. What type of sampling is used? O A. Systematic sampling is used, because students are selected from a list, with a fixed interval between students on the list. O B. Cluster sampling is used, because students are divided into groups, groups are chosen at random, and every student in one of those groups is sampled. O C. Convenience sampling is used, because students are chosen due to convenience of location. O D. Simple random sampling is used, because students are chosen at random. O E. Stratified sampling is used, because students are divided into groups, and students are chosen at random from these groups. What potential sources of bias are present, if any? Select all that apply. O A. Because of the…
1. Explain the difference between z-tests (which use categorical data), and t-tests (which use numerical data). 2. Conduct a t-test, both when given statistics, and when given data. 3. Conduct a t-test, 2-sample t-test, and paired t-test. 4. Differentiate between the five types of tests we have learned so far.
2) Discuss the appropriate sampling scheme for this survey. That is, how would you choose the 50 household in that area to do your survey.1. Age2. Gender: □ Female □ Male3. Education Level4. Occupation5. Number of people in the household6. Number of employees in the household:7. Total number of cars belonging to household:8. For how many years are you staying at his house?9. Are you a renter or homeowner: □ Homeowner □ Renter10. Number of rooms in the house11.Size of the house12 Rooms13 Heating/Isolation/installations14 Number of floors of the apartment15 Side of the house (side-view, sun exposure etc)16 I am ….. from the house I’m living
How is a sample related to a population? Choose the correct answer below. O A. A sample is a subset of a population. O B. A sample is a numerical measure that describes a sample characteristic. O C. A sample is the collection of all outcomes, responses, measurements, or counts.
How many days were 20 up to 25 packages shipped? What is the relative frequency of days in the 20 up to 25 class? Note: Round your answer to 2 decimal places. What is the midpoint of the 15 up to 20 class? Note: Round your answer to 1 decimal place. On how many days were there 10 or more packages shipped?
11. Doing homework A school newspaper article claims that 60% of the students at a large high school completed their assigned homework last week. Assume that this claim is true for the 2000 students at the school. a. Make a bar graph of the population distribution. b. Imagine one possible SRS of size 100 from this population. Sketch a bar graph of the distribution of sample data.
The number of cookies found in 10 different snack bags are shown below: 14, 12, 14, 13, 14, 14, 14, 15, 14, 12 Which center should be used to best represent the data? O a) The range of the number of cookies is 3. O b) The mean number of cookies is 13.6. Od The median number of cookies is 14. O d) The mode of the number of cookies is 14.
18. The governor of New York has banned selling or purchasing "large" soft drinks, where a "large" is defined as being more than 16 oz. Sonic, famous for its Route 44 drinks is interested in estimating the proportion of New Yorkers that favor this ban. From a random survey of 800 New Yorkers, 375 answered no to the question, “Do you favor the governor's ban on 'large' soft drinks?" a. Find a 97.5% confidence interval for the proportion of New Yorkers who favor the ban on "large" soft drinks. b. Interpret the confidence interval. c. Can you conclude with 97.5% confidence that a majority of New Yorkers favor the ban on "large" soft drinks? Why or why not. d. Without doing any other calculations, can you be 99% confident that a majority of New Yorkers favor the ban on “large" soft drinks?