Question

A data set on money spent on lottery tickets during the past year by households has a lowest value of and a highest value of . Suppose we want to group these data into classes of equal widths. Assuming we take the lower limit of the first class as and the width of each class equal to , what are the class boundaries and class midpoints

Answer 1

Following are the complete solution to the given question:

Explanation:

The Lower-limit of the Ist class:
`\$1`

The width of the class interval:
`\$200`

Lower-limit for the next five-class:
`\$201, \$401, \$601, \$801, \$1001`

Upper-limit for the next five-class:
`\$200, \$400, \$600, \$800, \$1000, \$1200`

For point a:

class intervals

`\$1-\$200\\\\ \$201-\$400\\\\ \$401-\$600\\\\ \$601-\$800 \\\\\$801-\$1000\\\\ \$1001-1200`

For point b:

Mid-points:

`\$100.5\\\\\$300.5\\\\\$500.5\\\\\$700.5\\\\\$900.5\\\\\$1000.5\\\\`