Reference: class activity question from my Data analysis course:

The government in country A wants to find out whether job vacancies have remained the same in November 2009 and November 2014. Number of job vacancies in 18 different industries was gathered from these two periods. TheSPSSresults from a paired-samples t-test are shown as follows:

\fPaired Samples Statistics Std. Error Mean N Std. Deviation Mean Pair 1 Nov_2009 10.089 18 6.5065 1.5336 Nov 2014 8.467 18 6.0951 1.4366\fPaired Samples Test Paired Differences 99% Confidence Interval Std. Std. Error of the Difference Sig. (2- Mean Deviation Mean Lower Upper df tailed) Pair 1 Nov_2009 - Nov_2014 1.622 2.4472 5768 -.0495 3.2940 2.812 17 012