Are the following sentences false or true?

Excuse me! Are these phrases correct?? (if not please tell why); Thank you in advance for your time!

1) The higher the Z, the more dispersed the graph of the sample mean would be!

2) The lower the Z, the closer the Xbar to the "population mean" would be! &

3) If Z is inside the acception region, then we are not sure whether to reject the null or not!