Question

You surveyed 20 of your friends and asked them how much they spend on coffee at Starbucks each week. Their responses ranged from $0 to $22.50 and the average was $8.64. You decide to create a histogram of the data. Which of the following is the best set of bins to use?

a. [0-25.00]

b. [5.00-10.00], [11.00-15.00] and [22.00-25.00]

c. [0-10.00], [5.00-15.00], [10.00-20.00] and [15.00-25.00]

d. [0.00-5.99], [6.00-11.99], [12.00-17.99] and [18.00-23.99]

Answer 1

d. [0.00-5.99], [6.00-11.99], [12.00-17.99] and [18.00-23.99]

Because,

here responses ranged from $0 to $22.50. Hence our first bin should start with $0.

Also bins should not be overlapped. Here only option (d) is correct which start with 0 and also bins are also not overlapping each other. Other options are either do not start with 0 or bins are overlapping.