Question

The dot plot shows the shoe sizes of two seventh grade classes.

Mrs. Markin's Class Mr. Antonio's Class


Shoe Size Shoe Size


Which statement is best supported by the data?
Responses

A The data for Mr. Antonio's class is clustered more than the data for Mrs. Markin's class.The data for Mr. Antonio's class is clustered more than the data for Mrs. Markin's class.

B The range of data for Mr. Antonio’s class is greater than the range of data for Mrs. Markin’s class.The range of data for Mr. Antonio’s class is greater than the range of data for Mrs. Markin’s class.

C The median shoe size in Mr. Antonio’s class is greater than the median shoe size in Mrs. Markin’s class.The median shoe size in Mr. Antonio’s class is greater than the median shoe size in Mrs. Markin’s class.

D The minimum shoe size in Mrs. Markin’s class is greater than the minimum show size in Mr. Antonio’s class.

Answer 1

I can’t see the dot plot you mean. Could you either paste the image or list the shoe-size data for each class (each size repeated for each dot)?

If you want to check yourself, here’s how to decide among the choices:

- A (more clustered): look at how tightly the dots are grouped. The class with dots concentrated over a smaller set of sizes is more clustered.
- B (range greater): compute range = largest size − smallest size for each class. If Mr. Antonio’s range is larger, B is true.
- C (median greater): list each class’s sizes in order and find the middle value (or average the two middle values if there’s an even number of students). If Mr. Antonio’s median is larger, C is true.
- D (minimum comparison): find the smallest size in each class. If Mrs. Markin’s smallest size is larger than Mr. Antonio’s smallest, D is true.

Send the plot or the two lists of sizes and I’ll pick the correct statement and show the work.