Chebysheff's Theorem states that the percentage of measurements in a data set that fall within ...

Chebysheff's Theorem states that the percentage of measurements in a data set that fall within three standard deviations of their mean is:
 a. 75.
  b. at least 75.
  c. 89.
  d. at least 88.9.

Q. 2

Not sampling from the intended target population is an example of _____.
 a. stratified sampling
  b. sampling error
  c. cluster sampling
  d. nonsampling error

Q. 3

Which of the following summary measures is affected most by extreme values?
 a. The median.
  b. The mean.
  c. The range.
  d. The interquartile range.

Q. 4

A list of the sampling units for a study is called a _____.
 a. frame
  b. cluster
  c. stratum
  d. population

Q. 5

The Empirical Rule states that the approximate percentage of measurements in a data set (providing that the data set has a bell shaped distribution) that fall within two standard deviations of their mean is approximately:
 a. 68.
  b. 75.
  c. 95.
  d. 99.

Q. 6

Survey costs are highest for _____surveys.
 a. mail
  b. personal interview
  c. Internet
  d. telephone

Q. 7

If two data sets have the same range:
 a. the distances from the smallest to largest observations in both sets will be the same.
  b. the smallest and largest observations are the same in both sets.
  c. both sets will have the same standard deviation.
  d. both sets will have the same interquartile range.