ECO 201 Post quiz

What is it called when one makes summary calculations on population or sample data?

Which of the following activities is an example of descriptive statistics?

You want to find out if the number of hours a student spent studying has any impact on the exam score. The exam score is

You design a questionnaire to collect data on "the ranking of a student in a class".

What type of scale is this variable measured in?

Which of the following apply to a continuous distribution?

The provost at NAU was interested in finding out whether students performed better in a traditional course or a blended-learning course. She commissioned a company to conduct a study.

The company obtained the list of names from the Franke College of Business and use a random number generator to draw 80 students so that each had the sample chance to be selected. It then randomly assigned 40 students to a traditional course and the remaining to a blended-learning course. The students in these two courses make up a

Which of the following is inferential statistics?

You want to find out if the number of classes a student enrolls in a semester has any impact on the exam score. The number of classes a student enrolls in is

You design a questionnaire to collect data on "the ethnic group of a student in a class". What type of scale is this variable measured in?

Which of the following apply to a probability density?

You are interested in finding out what percentage of NAU students work at least 10 hours a week while going to school. You obtained the roster of a ECO 201 class from your professor, wrote down the names of students on pieces of paper, shuffled the pieces of paper in a hat and pull out 5 names. The set of all NAU students is a

What is it called when one makes a decision concerning a population based on sample results?

You design a questionnaire to collect data on "the year that a student was born". What type of scale is this variable measured in?

A recent PwC Supply Global Chain survey indicated that companies that acknowledge the supply chain as a strategic asset achieve 70% higher performance.

The results are based on a survey of 503 supply chain executives in a wide range of industries representing a mix of company sizes from across different global regions so that each executive has equal chance to be selected. The group of 503 supply chain executives is a

The manager of the customer service division of a major consumer electronics company is interested in determining whether the customers who have purchased a Blu-ray player made by the company over the past 12 months are satisfied with their products.The possible responses to the question "What is your annual income rounded to the nearest thousands?" will result in a/an ______ scale variable

The following information is collected from students upon exiting the campus bookstore during the first week of classes. a. Amount of time spent shopping in the bookstore b.

Number of textbooks purchased c. Academic major d. Gender The "academic major" is a

A recent PwC Supply Global Chain survey indicated that companies that acknowledge the supply chain as a strategic asset achieve 70% higher performance. The results are based on a survey of 503 supply chain executives in a wide range of industries representing a mix of company sizes from across different global regions so that each executive has equal chance to be selected. The group of 503 supply chain executives is a

Which of the following activities is an example of descriptive statistics?

heck all that apply. Which of these is a commonly-used way to define the center of a distribution?

What does the coefficient of variation measure?

You have 8 numbers. The mean is 6. You add 5 to each number in the group.

What is the new mean?

You have two populations. One has a mean of 4 and a variance of 2. The other has a mean of 5 and a variance of 4. You randomly draw one number from each of the populations and compute the sum. If you did this over and over again, what would be the variance of the sums

Which of the following are measures of variability? Selected Answers:

You have two populations. One has a standard deviation of 6. The other has a standard deviation of 8.

You randomly draw one number from each of the populations and compute the sum. If you did this over and over again, what would be the standard deviation of the sums?

You have two populations. One has a mean of 4 and a variance of 2. The other has a mean of 5 and a variance of 4.

You randomly draw one number from each of the populations and compute the sum. If you did this over and over again, what would be the variance of the sums?

Which of the following is a balancing point?

Which of the following measure the average deviation of a data set?

How much time do Americans living in or near cities spend waiting in traffic, and how much does waiting in traffic cost them per year? The file here contains this cost for 30 cities. For the cost sitting in traffice, compute the balancing point, the value that occurs more than any other, the middle value, the standard deviation, skewness, kurtosis, coefficient of variation and range. Balancing point = [mean] The value that occurs more than any other = 0 The middle value = [median] Standard deviation = [std] Skewness = [skewness] Kurtosis = [kurtosis] Coefficient of variation = [cv]% Range = [range] Correct Answers for: mean Evaluation Method Correct Answer Case Sensitivity CorrectContains 779.

53 Correct Answers for: mode Evaluation Method Correct Answer Case Sensitivity CorrectContains 512 Correct Answers for: median Evaluation Method Correct Answer Case Sensitivity CorrectPattern Match (s)*765.50?(0)*n* Correct Answers for: std Evaluation Method Correct Answer Case Sensitivity CorrectPattern Match (s)*292.10?(0)*n* Correct Answers for: skewness Evaluation Method Correct Answer Case Sensitivity CorrectPattern Match (s)*0?.65n* Correct Answers for: kurtosis Evaluation Method Correct Answer Case Sensitivity CorrectPattern Match (s)*0?.

53n* Correct Answers for: cv Evaluation Method Correct Answer Case Sensitivity CorrectContains 37.47 Correct Answers for: range Evaluation Method Correct Answer Case Sensitivity CorrectPattern Match (s)*1223.?0?0?(0)*n*

Given the following investment returns from two stocks: Stock A: 5%,6%,7%,9%,23% (mean = 10% and standard deviation = 7.416%) Stock B: 50%,60%,70%,90%,230% (mean = 100% and standard deviation = 74.16%).

Which stock has the greatest relative risk? Which stock should a risk neutral investor choose?

You have a portfolio of investment which consists of Stock A with a return of A% and Stock B with a return of B%. Given the following average returns and standard deviations for both Stock A and Stock B, M(A) = 18%, M(B) = 51% s(A) = 1%, s(B) = 14% what is the absolute risk (standard deviation) of your portfolio assuming that the returns of Stock A and Stock B are uncorrelated?

You have a portfolio of investment which consists of Stock A with a return of A% and Stock B with a return of B%.

Given the following average returns and standard deviations for both Stock A and Stock B, M(A) = 11%, M(B) = 43% s(A) = 3%, s(B) = 12% what is the absolute risk (standard deviation) of your portfolio assuming that the returns of Stock A and Stock B are uncorrelated?

Which of the following measures the spread of the middle 50% of a data set?

minimizes the average absolute deviation?