Question

The data set represents the responses of 15 students who were asked how many text messages they send in a day.

{55, 50, 54, 51, 52, 53, 50, 51, 2, 56, 55, 56, 54, 57, 55}
The best measure of center for this data set is the
a. mean
b. median
c. range
d. interquartile range
and its value is
a.51
b. 52
c. 53
d. 54

Answer 1

There are only two statistics that could represent a typical user, the mean and the median.
The others are measures of dispersion.

The mean is very sensitive to outliers. The median is not.

You want a statistic that is insensitive to outliers.

http://www.wolframalpha.com/input/?i=median+55%2C+50%2C+54%2C+51%2C+52%2C+53%2C+50%2C+51%2C+2%2C+56%2C+55%2C+56%2C+54%2C+57%2C+55

Does this make sense?

Answer 2

yes thank you