Question

1. The plot below summarizes the distributions of speeds of two groups of ships. The box plot on the extreme right is for all the ships. The other two box plots are for the individual groups

Ship Speed (measured in knots) Speed (Knots) Group 1 Group 2 Both Groups

For parts a through c, consider the box plot for Group 1. Based on this box plot alone, what can you conclude about the % of speeds in Group 1 that are 18 knots or more?

(a) <50%of the speeds in Group 1 are 18 knots or more (T / F)

(b) ≤50%of the speeds in Group 1 are 18 knots or more (T / F)

(C) ≥50%of the speeds in Group 1 are 18 knots or more (T / F)

Answer 1

( a )

false  

<50%of the speeds in Group 1 are 18 knots or more  

( b )

false

≤50%of the speeds in Group 1 are 18 knots or more

( c )

true

≥50%of the speeds in Group 1 are 18 knots or more