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 Interactive Checkpoint
 Quartiles:  When data in a set are arranged in order, quartiles are the numbers that split the data into quarters (or fourths).

Comparing the Quality Ratings for Natural/Regular Peanut Butters:

Answer the following questions about quartiles using the box and whisker plots above.

 

Enter each answer and press tab to check

Graded Response
 

a) The median is the same as what quartile?

 

 a)
 

b) Estimate the third quartile for the natural brand peanut butter ratings.

 

 b)
 c) What is the interquartile range of regular brand peanut butter (the difference between the 25th and 75th percentiles) ?  c)