10 Sep Section Exercise 1-5 (Static)

Section Exercise 1-5 (Static)

(a) How much statistics does a business student need to know? (You may select more than one answer. Single click the box with the question mark to produce a check mark for a correct answer and double click the box with the question mark to empty the box for a wrong answer. Any boxes left with a question mark will be automatically graded as incorrect.)   check all that apply 1

· Not much – consultants do most of the statistical analysis.unanswered

· Enough to handle everyday data problems.unanswered

· Enough to feel confident discussing a colleague’s data analysis.unanswered

· Enough to know when to call in a statistical expert.unanswered

Answer:??

  (b-1) How can you tell when the point has been reached where you should call for an expert statistician?   multiple choice

· When you’ve reached the limit of your statistical expertise.

· When your boss asks for a report of last week’s sales data and you had planned to leave work early.

· When you’re looking for a promotion.

  (b-2) List some benefits that would govern the decision to call an expert statistician. (You may select more than one answer. Single click the box with the question mark to produce a check mark for a correct answer and double click the box with the question mark to empty the box for a wrong answer. Any boxes left with a question mark will be automatically graded as incorrect.)   check all that apply 2

· Better sampling strategies, which can result in more useful data.unanswered

· Better understanding of what information can be extracted from the data.unanswered

· Greater confidence in the results.unanswered

· Projects are always delivered on time.

 

 

 

2)

Ergonomics is the science of making sure that human surroundings are adapted to human needs. How could statistics play a role in the following:  

a. Choosing the height of an office chair so that 95 percent of the employees (male and female) will feel it is the “right height” for their legs to reach the floor comfortably.

b. Designing a drill press so its controls can be reached and its forces operated by an “average employee.”

c. Defining a doorway width so that a “typical” wheelchair can pass through without coming closer than 6 inches from either side.

d. Setting the width of a parking space to accommodate 95 percent of all vehicles at your local Walmart.

e. Choosing a font size so that a highway sign can be read in daylight at 100 meters by 95 percent of all drivers.

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Multiple Choice

·

All of these involve taking samples from the population of interest and estimating the value of the variable of interest.

·

All of these require the designer to take a census of the population that will be using the chair, drill press, doorway, parking space, or highway signs, in order to ensure 100 percent are accommodated.

·

All of these product specifications could be determined by a smart engineer or designer who represents the “typical” person using each of the products.

·

None of these responses.

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Answer: ???

 

3)

A National Health Interview Survey conducted by the U.S. Centers for Disease Control and Prevention reported that using a cell phone instead of a landline appeared to double a person’s chances of binge drinking. “I guess I’d better give up my cell phone,” said Bob.   Which fallacy, do you see in Bob’s reasoning? (You may select more than one answer. Single click the box with the question mark to produce a check mark for a correct answer and double click the box with the question mark to empty the box for a wrong answer. Any boxes left with a question mark will be automatically graded as incorrect.)   check all that apply

· Pitfall 4: Poor Survey Methodsunanswered

· Pitfall 5: Assuming a Causal Linkunanswered

· Pitfall 6: Generalization to Individualsunanswered

· Pitfall 7: Unconscious Bias

 

Answer: ??