4. Information Bias2
A city government is trying to determine the national origins of its recent immigrant population. If a survey of the immigrant population is conducted in English what type of error might be present in the data? 1. Random 2. Omission* 3. Outliers 4. Accuracy 5. Other: The use of Big Data is increasingly important to businesses in competitive markets. Which of the following characteristics is not true of big data? 1. Requires the use of analytics 2. Contains structured data 3. Contains unstructured data 4. Can be analyzed with traditional spreadsheets* The Davenport-Kim three-stage model consists of framing the problem, solving the problem, and communicating results. Which two of the following are part of framing the problem stage? 1. Determine the scope of the problem* 2. Data collection 3. Review of previous findings* 4. Presenting a recommendationA healthcare provider is researching blood glucose levels before and after exercising. What two elementsshould be part of any experimental study such as this? 1. Treatment procedures* 2. Patient observation 3. Statistical validity 4. Experimental response* Runners cover 26.2 miles in the Olympics marathon. What level of measurement is this? 1. Nominal 2. Ordinal 3. Interval 4. Ratio* What level of measurement is the type of cars produced in Ford factory? 1. Nominal* 2. Ordinal 3. Interval 4. Ratio What level of measurement is this the 10 best cities in the U.S. to retire in? 1. Nominal 2. Ordinal* 3. Interval 4. Ratio What level of measurement are women’s dress sizes (2,4,6, etc.)? 1. Nominal 2. Ordinal 3
3. Interval* 4. RatioA local school board is studying the impact of a proposed change in testing on math scores. Bias can be introduced into the study by both students and teachers. Which research technique would eliminate this type of bias? 1. Observation study 2. Blind study 3. Cohort study 4. Double blind study* A Company’s product development team test 3 new car waxes by waxing 5 cars with each wax and then running them through a car wash. They then record number of washes it takes before the wax begins to deteriorate. What is the term for the five cars? 1. The response 2. The construct validity 3. The experimental unit* 4. The treatment Module - 2 - Statistics as a Managerial Tool: Misuse of Statistics A group of observations with something in common 1. Sample 2. Random sample 3. Statistical population* What makes a sample random? 1. Being large enough 2. Equal opportunity for selection* A good sample will: 1. Accurately represent the population* 2. Be large enough* 3. Be inexpensive A reporter ask you if you support the lack of air quality your place of employment is introducing to the community. 1. Response Bias* 2. Conscious Bias Should we increase increase premiums to improve the quality of care?
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