2 DESCRIPTIVE STATISTICS

Question 1

outlier (extreme value)

Answer 1

an observation that does not fit the rest of the data

Question 2

histogram

Answer 2

a graphical representation in x-y form of the distribution of data in a data set; x represents the data and y represents the frequency, or relative frequency. The graph consists of contiguous rectangles.

Question 3

Frequency Polygon

Answer 3

looks like a line graph but uses intervals to display ranges of large amounts of data

Question 4

Percentile

Answer 4

a number that divides ordered data into hundredths; percentiles may or may not be part of the data. The
median of the data is the second quartile and the 50th percentile. The first and third quartiles are the 25th and the 75th percentiles, respectively

Question 5

Quartiles

Answer 5

the numbers that separate the data into quarters; quartiles may or may not be part of the data. The second quartile is the median of the data.

Question 6

Box plot
box and whisker plots
box whisker plots

Answer 6

a graph that gives a quick picture of the middle 50% of the data