statistical vocab

Question 1

line plot

Answer 1

a graph that uses Xs above a number line to show data; line plots are useful for showing how data is grouped

Question 2

statistical question

Answer 2

a question that can have a variety of answers and can be used to make a prediction about a larger group

Question 3

distribution

Answer 3

shows how spread out or how clustered data values are

Question 4

mean

Answer 4

the sum of all the values divided by the number of values

 7,9,10,13,15,15,15
  the mean is 12

Question 5

median

Answer 5

the middle number in a data set when all the values are listed from least to greatest

      7,9,10,13,15,15,15
        the median is 13

Question 6

mode

Answer 6

the number that appears most often in a data set
7,9,10,13,15,15,15
the mode is 15

Question 7

box plot

Answer 7

a five-number summary that includes the minimum,the lower quartile, the median,the upper quartile, and the maximum; shown graphically next to a number line

Question 8

lower quartile

Answer 8

the middle number of all values less than the medain

Question 9

upper quartile

Answer 9

the middle number of all values greater than the median

Question 10

range

Answer 10

the difference between the greatest and least values in data set

Question 11

interquartile range (IQR)

Answer 11

the difference between the upper quartile and lower quartile

Question 12

outlier

Answer 12

a data point far away from the other data points; it doesn’t quite fit with the rest of the data points