Ashford BUS 308 Week 1 Quiz

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1. Question : When using the Chebyshev’s theorem to obtain the bounds for 99.73 percent of the values in a population, the interval generally will be _______ the interval obtained for the same percentage if normal distribution is assumed (empirical rule).

Student Answer: narrower than

wider than

the same as

2. Question : An example of a qualitative variable is the mileage of a car.

Student Answer: True

False

3. Question : 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.

Student Answer: True

False

4. Question : All of the following are measures of central tendency except the

Student Answer: range

mode

mean

median

5. Question : Measurements from a population are called

Student Answer: statistics.

observations.

variables.

inferences.

6. Question : A normal population has 99.73 percent of the population measurements within ___ standard deviations of the mean.

Student Answer: one

two

three

four

7. Question : When a population is skewed to the left or right with a very long tail, what is the best measure to use for central tendency.

Student Answer: Population mean

Population mode

Population median

Population standard deviation

8. Question : All of the following are measures of central tendency except the

Student Answer: range

mode

mean

median

9. Question : Which percentile describes the first quartile Q1?

Student Answer: 25th

50th

75th

100th

10. Question : Any characteristic of a population unit is called a

Student Answer: measurement.

sample.

observation.

variable.

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