4. Measures of Position

Question 1

is a measure used in statistics indicating the value below which a given percentage of observations in a group of observations fall.

Answer 1

A. Percentile

Question 2

Certain percentiles are particularly important:

the ——— divide a data set into tenths (10 equal parts),
the ——— divide a data set into fifths (5 equal parts), and
the ——— divide a data set into quarters (4 equal parts).

Answer 2

deciles

quintiles

quartiles

Question 3

• are the most commonly used percentiles.

Answer 3

B. Quartiles

Question 4

• are the most commonly used percentiles.
  A data set has three quartiles, which we denote Q1, Q2, and Q3.

Answer 4

B. Quartiles

Question 5

A data set has ——— quartiles, which we denote Q1, Q2, and Q3.

Answer 5

three

Question 6

The ———, ———, is 25th percentile.

Answer 6

first quartile

Question 7

The ———, ———, is the median, which, as you know, is the number that divides the bottom 50% of the data from the top 50%.

Answer 7

second quartile

Question 8

The ———, ———, is the 75th percentile.

Answer 8

third quartile

Question 9

It is the number that divides the bottom 25% of the data from the top 75%.

Answer 9

first quartile

Question 10

It is the number that divides the bottom 75% of the data from the top 25%.

Answer 10

third quartile