Find the three quartiles 1,2,3 and Q.D. C.B.: 10-15 15-20 20-25 25-30 30-35 35-40 40-50 50-60 60-70 Frequency: 4 12 16 22 10 8 3 3 4
Answers
Answer:
For low count distributions, there is no universal agreement on selecting the quartile values (divide the ordered data set into two halves and then next halving...). If there are even number of data points, all methods give the same results.
Quartile
In statistics, a quartile, a type of quantile, is three points that divide sorted data set into four equal groups (by count of numbers), each representing a fourth of the distributed sampled population.
There are three quartiles: the first quartile (Q1), the second quartile (Q2), and the third quartile (Q3).
The first quartile (lower quartile, QL), is equal to the 25th percentile of the data. (splits off the lowest 25% of data from the highest 75%)
The second (middle) quartile or median of a data set is equal to the 50th percentile of the data (cuts data in half)
The third quartile, called upper quartile (QU), is equal to the 75th percentile of the data. (splits off the lowest 75% of data from highest 25%)
Step-by-step explanation:
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