1. A sample of student scores in a study resulted in a mode of 84, a median of 79, and a mean of 75. What can you determine about the distribution from this information? The data was:
a. Bimodal and symmetrical
b. Negatively skewed
c. Positively skewed
d. Unimodal and symmetrical
The answer is B but I want to know how to get to that answer by having the values of mean, median, and mode.
In advance I appreciate your time and help!!
Thanks!! :)
a. Bimodal and symmetrical
b. Negatively skewed
c. Positively skewed
d. Unimodal and symmetrical
The answer is B but I want to know how to get to that answer by having the values of mean, median, and mode.
In advance I appreciate your time and help!!
Thanks!! :)
-
Shana
If the median and mean are approximately equal, then it is symmetric
If mean < median it is left or negatively skewed [as in this problem]
If mean > median it is right or positively skewed
The mode doesn't really apply to symmetry ... any distribution can be modal, bi-modal or have multiple modes. See the following graph ...
http://stattrek.com/statistics/dictionar…
hope that helps
If the median and mean are approximately equal, then it is symmetric
If mean < median it is left or negatively skewed [as in this problem]
If mean > median it is right or positively skewed
The mode doesn't really apply to symmetry ... any distribution can be modal, bi-modal or have multiple modes. See the following graph ...
http://stattrek.com/statistics/dictionar…
hope that helps