Business Statistics in Practice 3rd Canadian Edition By Bruce – Test Bank

  • ISBN-10 ‏ : ‎ 0071339604
  • ISBN-13 ‏ : ‎ 978-0071339605
  • Publisher ‏ : ‎ McGraw-Hill Ryerson (January 1, 2014)
  • Author Bruce L. Bowerman
  • Edition 3RD

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Business Statistics in Practice 3rd Canadian Edition By Bruce – Test Bank

Chapter 1 Content 

Student: ___________________________________________________________________________

1. A population is a set of units (usually people, objects, or events).
True    False

2. If we examine half of the population measurements, we are conducting a census of the population.
True    False

3. A random sample is selected so that, on each selection from the population, every unit remaining in the population on that selection has the same chance of being chosen.
True    False

4. A process is in statistical control if it does not exhibit any unusual process variations.
True    False

5. An example of a quantitative variable is the make of a car.
True    False

6. An example of a qualitative variable is the fuel efficiency of a car, measured in L/100km.
True    False

7. Statistical inference is the science of using a sample of measurements to make generalizations about the important aspects of a population of measurements.
True    False

8. If we sample without replacement, we do not place the unit chosen on a particular selection back into the population.
True    False

9. By taking a systematic sample, in which we select every 100th shopper arriving at a specific store, we are approximating a random sample of shoppers.
True    False

10. Nonresponse reduces the sample size and may have a negative impact on the generalization of results if the individuals who do not respond are themselves nonrandom.
True    False

11. Undercoverage is when some units of the population are mistakenly included in the sample.
True    False

12. Suppose that the six students listed belearning Objective: w have applied for a bursary.
1. Justin 2. Gordon 3. Ahmed 4. Melanie 5. Olga 6. Ian
Only three students can receive the bursary. Because they have all met the criteria for the bursary, the three students who will receive the bursary will be selected at random. Consider the follearning Objective: wing list of random digits from a random number table:
27102 56027 55892 33063 41842 81868 71035 09001 43367 49497 54580 81507
Starting with the leftmost digit, use this list of random digits to choose a simple random sample of three students from the six students listed above. The sample you obtain is
A. Olga, Ian, and Ahmed.
B. Melanie, Ahmed, and Ian.
C. Justin, Gordon, and Olga.
D. Justin, Gordon, and Gordon again.
E. any set of 3 names, but we must exclude Gordon.

13. Ratio variables have the follearning Objective: wing unique characteristic:
A. Meaningful order
B. An arbitrarily defined zero value
C. Categorical in nature
D. Predictable with 100% accuracy
E. Equal distance between points

14. When we are choosing a random sample and we do not place chosen units back into the population, we are
A. sampling with replacement.
B. sampling by convenience.
C. using a systematic sample.
D. using a voluntary response sample.
E. sampling without replacement.

15. Which one of the follearning Objective: wing is a quantitative variable?
A. The make of a TV.
B. A person’s gender.
C. A person’s height.
D. Whether a person is an university graduate or not.
E. Whether a person has a credit card.

16. Which one of the follearning Objective: wing is a categorical variable?
A. Air temperature.
B. Bank account balance.
C. Daily sales in a store.
D. Whether a person has a traffic violation.
E. Value of company stock.

17. Measurements from a population are also known as
A. statistics.
B. observations.
C. variables.
D. processes.
E. functions.

18. If the runs plearning Objective: t for a process shows increasing variation around a constant level, then the process is
A. reliable.
B. capable.
C. profitable.
D. predictable.
E. out of control.

19. The two levels of measurement for quantitative variables are
A. ordinal and ratio.
B. interval and ordinal.
C. nominative and ordinal.
D. interval and ratio.
E. nominative and interval.

20. Temperature, (in degrees Celsius) is an example of a(n) ________ variable.
A. nominative
B. ordinal
C. interval
D. ratio
E. random

21. Jersey numbers of soccer players are an example of a(n) ___________ variable.
A. nominative
B. ordinal
C. interval
D. ratio
E. random

22. Weights of items obtained using a well-adjusted scale represents a(n) _____________ level of measurement.
A. nominative
B. ordinal
C. interval
D. ratio
E. balanced

23. An identification of police officers by rank would represent a(n) ____________ level of measurement.
A. nominative
B. ordinal
C. interval
D. ratio
E. professional

24. __________ is a necessary component of a runs plearning Objective: t.
A. Observation over time
B. A qualitative variable
C. Random sampling of the data
D. Voluntary response data
E. A Likert scale survey

25. ______________ is the science of using a sample of measurements to make generalizations about the important aspects of a population.
A. Statistical process control
B. Descriptive statistics
C. Random sample
D. Statistical inference
E. Deductive reasoning

26. Degree program entrance exam scores, such as MCAT scores, are an example of a(n) ________________ variable.
A. ordinal
B. ratio
C. nominative
D. interval
E. undefined

27. The number of kilearning Objective: metres a truck is driven before it is overhauled is an example of a(n) _____________ variable.
A. nominative
B. ordinal
C. interval
D. ratio
E. maintenance

28.  Which one of the following sampling methods would generally lead to the least reliable statistical inferences about the population from which the sample has been selected?
A.  A random sample selected without replacement.
B.  A random sample selected with replacement.
C.  A voluntary response sample.
D.  A systematic sample.
E.  A stratified random sample. 

29. A(n) _____ variable is a qualitative variable such that there is no meaningful ordering or ranking of the categories.
A. ratio
B. ordinal
C. nominative
D. interval
E. random

30. A person’s telephone area code is an example of a(n) _____________ variable.
A. nominative
B. ordinal
C. interval
D. ratio
E. independent

31. Any characteristic of a population unit is a(n):
A. measurement
B. sample
C. observation
D. variable
E. trait

32. A list of all of the units in a population is called a _____.
A. census
B. frame
C. random sample
D. variable
E. systematic sample

33. The two levels of measurement for qualitative variables are
A. ordinal and ratio.
B. interval and ordinal.
C. nominative and ordinal.
D. interval and ratio.
E. nominative and interval.

34. Each customer in a market research study is asked to identify their favourite beverage. The level of measurement for this study would be at the _____ level.
A. nominal
B. ordinal
C. interval
D. ratio
E. quantitative

35. In sampling from the population, a _____ is a unique group representing a segment of the population of interest and which has been predetermined by the researcher.
A. focus group
B. system
C. parliament
D. response
E. stratum

36. When a researcher uses a(n) _____ sample, they decrease bias in the sample.
A. voluntary response
B. small
C. expensive
D. random
E. convenience

37. A researcher believes a person’s gender will influence their answer to a particular question. In order to take this into account, the researcher selects a random sample of 100 men and another random sample of 100 women. This is an example of a ______ sample.
A. stratified random
B. simple random
C. biased
D. multistage cluster
E. systematic

38.  A _____ plot is a graph of individual process measurements versus time.
A.  line
B.  runs
C.  scatter
D.  pie-chart
E.  stem 

39. A machine produces pencils. At the start of the day, the potential number of pencils produced is _____. At the end of the day, the actual number of pencils produced is _____.
A. finite, infinite
B. actual, probable
C. infinite, finite
D. staged, actual
E. controlled, measured

40. If a process does not exhibit any unusual process variations, then the process is said to be in _________.
________________________________________

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