Monthly Social Security Benefits The average monthly
Chapter 9, Problem 14(choose chapter or problem)
Monthly Social Security Benefits The average monthly Social Security benefit in 2004 for retired workers was $954.90 and for disabled workers was $894.10. Researchers used data from the Social Security records to test the claim that the difference in monthly benefits between the two groups was greater than $30. Based on the following information, can the researchers 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 Source: New York Times Almanac.
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