Question 7·Easy·One-Variable Data Distributions; Measures of Center and Spread
| Type of store | Average number of employees |
|---|---|
| Warehouse store | 365 |
| Department store | 213 |
| Supermarket | 130 |
For a certain region, the table shows the average number of store employees in 2016 by type of store. Based on the table, how much greater was the average number of store employees in warehouse stores than in supermarkets?
For table and data comparison questions, first pick out only the rows and columns the question mentions, then translate phrases like "how much greater" or "how much less" into subtraction with the larger value first. Write a quick expression (such as larger − smaller) before doing any arithmetic to avoid mixing up which numbers to use, and ignore any extra information from the table that the question does not reference.
Hints
Focus on the two store types mentioned
You only need the numbers for warehouse stores and supermarkets from the table. Ignore the department store for this question.
Translate "how much greater" into math
When a question asks "how much greater" one value is than another, think about which arithmetic operation compares two values in that way.
Set up the expression
Use the number for warehouse stores first and the number for supermarkets second in your expression. Be careful about the order when you compare them.
Desmos Guide
Use Desmos to compute the difference
In the Desmos input line, type 365 - 130 and press Enter. The value that appears is the difference in average employees between warehouse stores and supermarkets.
Step-by-step Explanation
Identify the relevant values and operation
From the table:
- Warehouse store average employees:
- Supermarket average employees:
The question asks, "how much greater" the warehouse average is than the supermarket average. This means you should subtract the supermarket number from the warehouse number:
Perform the subtraction to find the difference
Now subtract:
So, the average number of employees in warehouse stores is 235 greater than in supermarkets.