what is percentiles and quartiles

Identify the incorrect statement(s). I. Percentiles divide the data set into 100 equal groups. II. Deciles divide the distribution into 10 equal groups. III. Quartiles divide the distribution into 25 equal groups. => all are incorrect or I only or II only or III only..

What are the values of lower quartile and upper quartile of a data set, if its least value is 171, middle quartile is 257 and the greatest value is 304? => 171, 304 or 171, 257 or 257, 304 or Cannot be determined..

The position of the greatest value in a set of data is 11. What are the positions of the lower quartile, the middle quartile and the upper quartile? => 1, 3, 6 or 3, 6, 9 or 3, middle of 5 th and 6 th positions, 10 or Cannot be determined..

Is the middle quartile value equal to the average of the lower quartile and the upper quartile? => Yes or No..

Find the percentile rank for a weight of 92 pounds if the weights (in pounds) of 6 students are given: 97, 78, 86, 82, 88, 92 What value corresponds to the 60 th percentile? => 25 th percentile, 86 or 75 th percentile, 88 or 75 th percentile..

What is the product of all the three quartiles of the box-and-whisker plot? => 1234 or 2431 or 2050 or None of the above..

The three quartiles divide a data set into _____ equal parts. => four or five or two or three..

What is the ratio of lower quartile to middle quartile to upper quartile for the data set? 2, 3, 9, 10, 11, 12, 15, 17, 6, 7, 8, 9, 17, 23, 24, 19, 22, 22 and 23 => 4 : 6 : 11 or 2 : 3 : 4 or 4 : 6 : 3 or 1 : 2 : 3..

What is the ratio of lower quartile to middle quartile to upper quartile for the data set? 2, 3, 9, 10, 11, 12, 15, 17, 6, 7, 8, 9, 17, 23, 24, 19, 22, 22 and 23 => 2 : 3 : 4 or 1 : 2 : 3 or 4 : 6 : 3 or 4 : 6 : 11..

The salaries (in hundreds of dollars) of the employees at a local company are 12, 10, 17, 29, 12, 8, 21, 37, 32, 34 and 29. What is the sum of the lower quartile and the upper quartile? => 44 or 32 or 20 or 12..