Question

students in the 7th, 8th, and 9th grade were asked whether they prefer to write in pen or pencil.

• 40 students prefer to write in pen.
• 60 students prefer to write in pencil.
• create values that could represent the number of students in the 7th, 8th, and 9th grade that responded to the survey.

a recent study observed the number of bike riders ages 0 to 20 that wear helmets. the results are represented in the table.
use the data in the table to make a conclusion about helmet usage in the different age groups. explain your reasoning.
learning targets
+ i can calculate missing values in a two - way table.
+ i can create a two - way table for categorical data given information about a situation.
+ i can describe what the values in a two - way table mean in the context of the situation.

Explanation:

For the 0 - 5 age group, the number of helmet - wearers (21) is much higher than non - wearers (4). For 6 - 10 age group, helmet - wearers (34) are also more than non - wearers (14). But for 11 - 15 age group, non - wearers (18) are more than wearers (14), and for 16 - 20 age group, non - wearers (12) are much more than wearers (3). So, as age increases from 0 - 20, the tendency to wear helmets decreases.

Answer:

Younger bike riders (ages 0 - 10) are more likely to wear helmets than older bike riders (ages 11 - 20).