The average monthly SS-benefits in 2004 for retired workers of a business

company was $954.90 and for disabled workers was $894.10. Researcher

used data from SS-Records to test the claim that the difference in monthly

benefits between the 2-groups was greater than $30. Based on the following

information can the researcher claim be supported at the 0.05 level of

significance?

Retired Disabled

Sample size 60 60

Mean benefit 960.50 902.89

Population Standard deviation 98 101