Specifically, I need assistance in understanding why my confidence intervals values plugged into SPSS are incorrect and what hand calculations must be made to obtain accurate information for Problem set 3.6

Problem Set 3.6:Confidence Intervals

Criterion:Calculate confidence intervals usingSPSS.

Data:Usethe SPSS output from Problem Set 3.5 below.

Instructions: Based on the SPSS output from Problem Set 3.5, including a test value (population mean) of 8, calculate the 95% confidence interval.

One-Sample Statistics Std. Std. Error N Mean Deviation Mean Time 15 7.3333 5.23268 1.35107 One-Sample Test Test Value = 8 95% Confidence Interval of Sig. (2- Mean the Difference df tailed) Difference Lower Upper Time -.493 14 .629 -.66667 -3.5644 2.2311