Let's put it this way. I'm "more confident" the resurrection is true because these events occurred --
* Saint Stephen, Protomartyr, was stoned c. 34 A.D.
* James the Great (Son of Zebedee) was beheaded in 44 A.D.
* Philip the Apostle was crucified in 54 A.D.
* Matthew the Evangelist killed with a halberd in 60 A.D.
* James the Just, beaten to death with a club after being crucified and stoned.
* Matthias was stoned and beheaded.
* Saint Andrew, St. Peter's brother, was crucified.
* Saint Mark was dragged in the streets until his death
* Saint Peter, crucified upside-down.
* Apostle Paul, beheaded in Rome.
* Saint Jude was crucified.
* Saint Bartholomew flayed alive and crucified.
* Thomas the Apostle was killed with a spear.
* Luke the Evangelist was hung.
* Simon the Zealot was crucified in 74 A.D.
(Note: John the Evangelist according to legend was cooked in boiling hot oil but survived. He was the only one of the original twelve Apostles who was not martyred).
http://en.wikipedia.org/wiki/List_of_Christian_martyrs
-- than I would be if the above events never happened to the formerly uncertain, cowardly apostles.