431 500 926 383 425 538 540 301 360 338 800 800 790 375 380 434 800 659 512 430 485 309 618 605 531 300 420 865 424 652

The dataset for this project is the length (in thousands of miles) of 30 longest rivers.

1. Construct a grouped frequency distribution for the sample data. Use 6 classes. Use the minimum data value as the lower limit of the first class.