graph itself does not explain why fewer students score above a 1400. The
difference between C and D is that C refers to any student in the world, whereas
D focuses on those in America. Remember that our data is all taken from
American students, so D is the more valid conclusion.
Let’s Review
Let’s do some Problem Solving and Data Analysis questions.
1 The ratio of tattoos to nose rings in this room is 3 to 1. The number
of nose rings is 12. How many tattoos are there in total?
Let’s set it up.
a. b. Number of nose rings = 12
c. Replace the words nose rings in the first step with the number 12: Now, solve for tattoos. Tattoos = 36.
Why? Because , right? Or 36:12 = 3:1.
2 In the chart that follows, cruller prices recorded from all over the
world are arranged by cruller length, as well as the line of best fit.
Which of the following can be said about the data?
A) A 7-inch cruller will cost $9.
B) A 7-inch cruller is likely to cost $9.
C) A 5-inch cruller will cost $9.
D) A 5-inch cruller is likely to cost $9.