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

**ISBN-10: 0071339604, ISBN-13: 978-0071339605**

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

True False

- If we examine half of the population measurements, we are conducting a census of the population.

True False

- 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

- A process is in statistical control if it does not exhibit any unusual process variations.

True False

- An example of a quantitative variable is the make of a car.

True False

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

True False

- 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

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

True False

- By taking a systematic sample, in which we select every 100
^{th}shopper arriving at a specific store, we are approximating a random sample of shoppers.

True False

- 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

- Undercoverage is when some units of the population are mistakenly included in the sample.

True False

- 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.

- 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

- 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.

- 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.

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