The median US salary is $50,700, according to US Census data.Using a one-sample
t-test, test to see if participant income (INC1) is differentfrom the national average. Use a two-tailed test and an alpha levelof 5%.
- Participant income is significantly greater than the nationalaverage
- Participant income is significantly less than the nationalaverage
- Participant income is not significantly different from thenational average
- Participant income cannot be compared to the nationalaverage
One-Sample Statistics
INCOME N=400 Mean=$47,112.92 Std. Deviation=$40,477.089 Std.Error Mean=$2,023.854
One-Sample Test
Test Value = 0
INCOME t=23.279 df=399 Sig. (2-tailed)=.000 MeanDifference=$47,112.920
95% Confidence Interval of the Difference
(lower)$43,134.17 (higher)$51,091.67
