5) (2 pts)
One fourth of the scores in any data set are below the
A) first quartile
B) secon quartile
C) third quartile
D) fouthr quartile
According to Wikipeia:
<<In descriptive statistics, a quartile is any of the three values which divide the sorted data set into four equal parts, so that each part represents 1/4th of the sampled population.
Thus:
first quartile (designated Q1) = lower quartile = cuts off lowest 25% of data = 25th percentile >>
So the correct answer is A)
To determine which quartile corresponds to 25% of the data set, you need to understand how quartiles divide a data set into four equal parts.
First, you can order the data set from lowest to highest.
Then, you can calculate the position of the first quartile by multiplying the total number of values by 0.25.
Let's say you have a data set of 100 values. To find the position of the first quartile, you would multiply 100 by 0.25, which gives you 25. The first quartile is the value at position 25 in the ordered data set.
So, the answer to this question is A) first quartile.