Assignment

1. 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).
narrower than
wider than
the same as

2. An example of a qualitative variable is the mileage of a car.
True
False

3. 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

4. All of the following are measures of central tendency except the
range
mode
mean
median

5. Measurements from a population are called
statistics.
observations.
variables.
inferences.

6. A normal population has 99.73 percent of the population measurements within ___ standard deviations of the mean.
one
two
three
four

7. 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.
Population mean
Population mode
Population median
Population standard deviation

8. All of the following are measures of central tendency except the
range
mode
mean
median

9. Which percentile describes the first quartile Q1?
25th
50th
75th
100th

10. Any characteristic of a population unit is called a
measurement.
sample.
observation.
variable.