Question 1198359
Depends on the Confidence Level
and whether using one or two tailed
Using α = 0.05 and one tailed

t-value = -2.5713   {{{t =blue(-.4)/blue(1.1/sqrt(50))}}}    
p-value = .0132
.0132 < .05, reject Ho
________
with two tailed:
Ho:  mean = 2.3
Ha:  mean  ≠ 2.3
p = .0066