## Revise Your Work

## Step 1: Work Time

# Revise Your Work

Work with your partner to revise your work on the Self Check problem based on the previous questions and feedback from your partner.

**Self Check Problem**

A school has 10 seventh grade classes, each with 30 students. Lucy wants to find out how well the students can estimate the weight of a gallon of water. She realizes that she cannot survey everyone, but she isn’t sure how to proceed.

- How could Lucy go about collecting her data? Lucy decides to start with a random sample of 10 seventh grade students. The students made the following estimates for the weight of a gallon of water (in pounds): 6, 7, 9, 8, 7, 10, 8, 6, 9, 8
- Based on this sample, what does a typical seventh grade student at the school think a gallon of water weighs?
- How did you reach your conclusion?
- Based on the sample, how many seventh grade students at the school think that a gallon of water weighs between 7 and 9 lbs?

## Step 2: Work Time

# Challenge Problem

- Create a data set for a different group of 10 students such that the data set has a lower mean, a greater range, but the same median.
- Compare your data set with that of another student. How are the data sets the same? How are they different?