Which statements regarding measures of central tendency are ...

[jenna1]

Which statements regarding measures of central tendency are accurate? (Select all that apply.)
 
  a. This classification of levels of measurement is scientifically inaccurate.
  b. Having the mean, mode, and median exactly the same indicates the measures have been correctly applied.
  c. They have great flexibility with regard to the amount of mathematical manipulation possible.
  d. They vary from sample to sample, even when the same trait or characteristic is measured.

Question 2

Which data measurement scales typically use nonparametric tests of significance? (Select all that apply.)
 
  a. Nominal
  b. Ordinal
  c. Interval
  d. Ratio

[tofugiraffe]

Answer to Question 1

ANS: C, D

Feedback
Correct Various inferential statistical tests employ mean, median, or mode in their calculations.
Measures of central tendency vary from sample to sample, even when the same trait is measured.
Incorrect The classification of levels of measurement is well accepted by the scientific community.
This is an inaccurate statement.

Answer to Question 2

ANS: A, B

Feedback
Correct Nonparametric tests of significance are used when data are measured on a nominal or ordinal scale.
Nonparametric tests of significance are used when data are measured on a nominal or ordinal scale.
Incorrect Parametric statistics are used when data are scaled at the interval or ratio level scale.
Parametric statistics are used when data are scaled at the interval or ratio level scale.